Spanish 3 Quiz: Preterite Vs Imperfect In Narration
9 questions · exam conditions
0:00
Preterite Vs Imperfect In NarrationQuestion 1 of 9

De niña, Elena siempre (A) quería/quiso ser médica. Sin embargo, a los dieciséis años (B) conocía/conoció a un escultor famoso que (C) vivía/vivió cerca de su casa y que le (D) enseñaba/enseñó el arte de la cerámica durante tres meses.

Which combination of verb forms for blanks A, B, C, and D is correct, and which of the following explanations best justifies each choice?

A=quería, B=conoció, C=vivía, D=enseñó — habitual childhood desire; punctual first meeting; concurrent background residence; completed teaching activity bounded by the explicit three-month limit
A=quería, B=conoció, C=vivía, D=enseñaba — habitual desire; punctual meeting; background residence; ongoing repeated teaching process lasting several months without a clear narrative endpoint
A=quiso, B=conoció, C=vivía, D=enseñó — desire bounded by her eventual career change; punctual meeting; background residence; completed teaching period delimited by the three-month reference
A=quería, B=conocía, C=vivió, D=enseñó — habitual desire; ongoing neighborhood acquaintance with the sculptor; his residence framed as a completed and finished period; completed teaching bounded by the explicit duration
← Back to quizzes

Spanish 3 Quiz

Spanish 3 Quiz: Preterite Vs Imperfect In Narration

Practice Preterite Vs Imperfect In Narration in Spanish 3 with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Preterite Vs Imperfect In Narration, giving you a quick way to practice the rules, question types, and explanations that matter most for Spanish 3.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

De niña, Elena siempre (A) quería/quiso ser médica. Sin embargo, a los dieciséis años (B) conocía/conoció a un escultor famoso que (C) vivía/vivió cerca de su casa y que le (D) enseñaba/enseñó el arte de la cerámica durante tres meses.

Which combination of verb forms for blanks A, B, C, and D is correct, and which of the following explanations best justifies each choice?

  1. A=quería, B=conoció, C=vivía, D=enseñó — habitual childhood desire; punctual first meeting; concurrent background residence; completed teaching activity bounded by the explicit three-month limit (correct answer)
  2. A=quería, B=conoció, C=vivía, D=enseñaba — habitual desire; punctual meeting; background residence; ongoing repeated teaching process lasting several months without a clear narrative endpoint
  3. A=quiso, B=conoció, C=vivía, D=enseñó — desire bounded by her eventual career change; punctual meeting; background residence; completed teaching period delimited by the three-month reference
  4. A=quería, B=conocía, C=vivió, D=enseñó — habitual desire; ongoing neighborhood acquaintance with the sculptor; his residence framed as a completed and finished period; completed teaching bounded by the explicit duration
Explanation: When tackling preterite vs. imperfect questions in Spanish, ask yourself one key question for each verb: is this action a background state/habitual behavior, or is it a completed event with a clear endpoint? In this passage, blank A describes Elena's childhood dream — a habitual, ongoing desire with no implied endpoint, so quería (imperfect) is correct. Blank B marks a specific, one-time event: the moment she met a sculptor. First meetings are classic punctual events, making conoció (preterite) the right call. Blank C describes the sculptor living near her house — this is background context, a static situation that frames the story, so vivía (imperfect) fits perfectly. Blank D is where students most often hesitate: enseñó (preterite) is correct because "during three months" (durante tres meses) acts as an explicit time boundary, signaling the teaching was a completed activity with a defined limit. That reasoning confirms answer A as correct. Answer B fails specifically at blank D — claiming the teaching was an ongoing process without a clear endpoint ignores the explicit "three months" boundary, which in Spanish grammar triggers the preterite. Answer C incorrectly uses quiso for blank A, implying her desire was a bounded, completed event; but the passage uses de niña to frame it as a general childhood characteristic, not a single resolved moment. Answer D misuses conocía for blank B — as if the relationship were already ongoing background — and vivió for blank C, treating the sculptor's residence as a completed event rather than setting. Your study tip: whenever you see an explicit duration like durante X meses/años, that's a strong signal the preterite is needed — it boxes the action into a completed package.

Question 2

Cuando era adolescente, mi abuela (1)  el piano todos los días. Un verano, (2)  a un compositor reconocido que le (3)  que tenía talento excepcional. Desde ese momento, ella (4)  practicar con más dedicación.

Which of the following correctly fills blanks (1) through (4) AND provides the most accurate grammatical justification for blank (4)?

  1. (1) tocaba, (2) conoció, (3) dijo, (4) empezó — 'empezó' is correct because 'desde ese momento' marks a specific starting point, framing the behavioral change as a punctual narrative event rather than an ongoing background habit (correct answer)
  2. (1) tocaba, (2) conoció, (3) dijo, (4) empezaba — 'empezaba' is correct for blank (4) because the increased dedication describes the grandmother's new habitual behavior going forward from that point, and habitual behaviors viewed retrospectively always take imperfect regardless of their inception
  3. (1) tocó, (2) conoció, (3) dijo, (4) empezó — 'tocó' is correct for blank (1) because 'todos los días' during adolescence implies a completed and bounded series of actions across a defined life period; 'empezó' for blank (4) because the new dedication clearly began at a discrete moment
  4. (1) tocaba, (2) conocía, (3) dijo, (4) empezó — 'conocía' is used because the narrator implies the grandmother had some prior familiarity with composers during that summer period; 'empezó' for blank (4) because 'desde ese momento' identifies a clearly punctual moment of change
Explanation: When tackling preterite vs. imperfect questions, ask yourself two things for each blank: What was the role of this action in the story? (background/habit vs. completed event) and What temporal markers appear nearby? Blank (1) — "el piano todos los días" during adolescence describes a repeated, habitual background action, so tocaba (imperfect) is correct. Blank (2) — "conoció" is right because meeting someone is a punctual, completed event that advances the narrative. Blank (3) — "dijo" marks another completed narrative event (the composer's single statement). Blank (4) — "desde ese momento" signals a specific, identifiable starting point, making the behavioral change a punctual event anchored to that moment — so empezó (preterite) is the correct choice. This is option A, and its justification is precise: the phrase frames the shift as a narrative turning point, not ongoing background. Option B fails because its justification contains a dangerous overgeneralization: habitual behaviors do NOT "always" take the imperfect. What matters is how the action is framed — as a beginning point or as ongoing background. "Empezó a practicar" captures the inception of a new behavior, which is punctual by nature. Option C incorrectly uses "tocó" for blank (1). "Todos los días" signals habitual repetition, which demands the imperfect tocaba, not the preterite — regardless of whether adolescence is a "bounded life period." Option D incorrectly uses "conocía," implying prior familiarity rather than a first meeting. Context clearly describes an initial encounter, requiring the preterite conoció. Study tip: Watch for temporal trigger phrases — "todos los días" signals imperfect; "desde ese momento" and "un verano" signal preterite events.

Question 3

Consider two Spanish sentences about the same event: (I) 'Ayer llovió durante tres horas.' (II) 'Ayer llovía cuando salí de casa.' A student argues that sentence (I) uses preterite incorrectly because rain is a natural, continuous atmospheric condition — inherently stative — and should always take imperfect in past narration. Which response most precisely refutes this reasoning?

  1. The student is correct that rain is stative, but wrong about the consequence: stative verbs in past narration take preterite only when accompanied by an explicit time duration like 'tres horas,' which grammatically overrides the stative classification and forces preterite as a fixed morphological rule, regardless of how the speaker conceptualizes the situation.
  2. The student's reasoning correctly identifies that stative verbs default to imperfect, and sentence (I) is actually non-standard; while some native speakers may produce it informally, prescriptive grammar requires 'ayer llovía durante tres horas' to maintain aspectual consistency with the inherently continuous and unbounded nature of precipitation.
  3. The student is partially correct: rain is indeed stative and normally takes imperfect, but sentence (I) is acceptable because meteorological verbs are exceptional in Spanish grammar and may optionally take preterite when a time expression is present, as a stylistic rather than aspectual choice available to the speaker.
  4. The student's reasoning is flawed because the preterite/imperfect distinction is not determined by whether a situation is inherently stative or dynamic, but by how the speaker frames the event aspectually: 'durante tres horas' in sentence (I) presents the rain as a bounded, completed event with a measurable endpoint, justifying preterite; sentence (II) presents the rain as an unbounded ongoing background, justifying imperfect. (correct answer)
Explanation: When tackling preterite vs. imperfect questions, resist the temptation to classify verbs as inherently "preterite verbs" or "imperfect verbs." The real question is always: how does the speaker frame the event aspectually? This distinction is about viewpoint, not vocabulary categories. In sentence (I), "llovió durante tres horas," the phrase durante tres horas imposes a clear boundary — the rain started, lasted exactly three hours, and stopped. The speaker packages the entire event as a completed, measurable unit. That bounded framing is precisely what preterite expresses. In sentence (II), "llovía cuando salí de casa," the rain serves as ongoing background against which another action (leaving the house) occurs — unbounded, no endpoint in view. That's the imperfect's job. Answer D captures this perfectly: the choice between preterite and imperfect reflects the speaker's aspectual framing, not the verb's inherent lexical class. Answer A is dangerously close to right but wrong for the wrong reason — it claims durante tres horas mechanically "overrides" stative classification as a fixed morphological rule. In reality, no such automatic rule exists; it's about conceptualization, not a grammatical trigger. Answer B is simply incorrect — llovió durante tres horas is perfectly standard Spanish, not informal or non-prescriptive. Answer C creates a false exception category, suggesting meteorological verbs have special optional rules; they don't — the same aspectual logic applies to all verbs. Your study takeaway: always ask yourself "Is the speaker presenting this as completed/bounded (preterite) or ongoing/backgrounded (imperfect)?" Time expressions like durante are clues to framing, not rules that force a tense.

Question 4

El detective entró al cuarto. Había papeles por todas partes. La ventana estaba abierta y una brisa suave movía las cortinas. En el escritorio, alguien había dejado una taza de café que todavía estaba caliente. El detective se dio cuenta de que el sospechoso acababa de salir.

A student claims that 'movía' in the third sentence should be changed to 'movió' because it describes a specific, observed action that occurred at a single moment during the detective's entry. Which of the following responses most accurately evaluates this claim?

  1. The student is correct: verbs describing visible physical actions witnessed by a character in a narrative moment are bounded by the character's perception and therefore require preterite, just as 'entró' does in the same scene.
  2. The student is incorrect, but for a different reason: 'movía' is required here not because of aspectual background framing but because 'cortinas' is a plural noun, and plural subjects in descriptive past clauses always trigger imperfect agreement in literary narration.
  3. The student is incorrect: 'movía' is appropriate because the breeze moving the curtains is part of the static scene description the detective perceives upon entering — it is an ongoing, atmospheric background condition framing the moment, not a discrete event that advances the narrative plot. (correct answer)
  4. The student is partially correct: 'movió' would be acceptable if the sentence were the first observation the detective made, but since it follows other imperfect descriptions, sequence-of-tense rules require all subsequent descriptive clauses to maintain imperfect aspect throughout the passage.
Explanation: Whenever you see a question about preterite vs. imperfect in narrative passages, ask yourself one key question: does this verb describe a bounded event that moves the story forward, or does it paint the background scene? This distinction — called verbal aspect — is the core of this question. In the passage, the detective enters a room and takes in his surroundings. The breeze moving the curtains isn't a plot event — it's atmospheric texture, part of the static scene he steps into. It was already happening, with no clear beginning or end within the narrative moment. That ongoing, background quality is exactly what the imperfect captures. 'Movía' is correct, making C the right answer. A is tempting because the action is visible and physical, but visibility doesn't determine aspect. 'Entró' uses preterite because the detective's entry is a discrete, completed action that initiates the scene — it advances the plot. The curtains moving is not an event; it's a condition the room has. Conflating "witnessed" with "bounded" is a classic trap. B introduces a completely fabricated grammar rule. Plural subjects do not trigger imperfect aspect in literary narration — aspect is determined by meaning and context, not noun number. Dismiss any answer that invents grammatical rules like this. D is equally false. Spanish has no "sequence-of-tense" rule that forces all verbs in a passage to match the aspect of surrounding verbs. Each verb is evaluated independently based on its own meaning. Study tip: When analyzing a past-tense verb, mentally ask: "Was this a moment or a movie?" Events are preterite; background scenes playing like ambient footage are imperfect.

Question 5

La noche del estreno, el teatro   lleno de espectadores ansiosos. Los actores   nerviosos entre bastidores cuando, de repente, las luces   y el público  .

A student must choose between preterite and imperfect for each blank. Which of the following analyses of the four blanks is linguistically most accurate?

  1. All four blanks require imperfect because the entire scene depicts a description of a single theatrical night, and any situation that is part of a larger descriptive context — including sudden occurrences — defaults to imperfect aspect throughout the passage.
  2. Blanks 1 and 2 require imperfect (scene-setting descriptions: the theater's state and the actors' emotional state), while blanks 3 and 4 require preterite (the lights going out and the audience reacting are sequential, bounded events that advanced the narrative). (correct answer)
  3. Blank 1 requires preterite because 'lleno' is a past participle used predicatively, which forces a completed-state reading; blank 2 requires imperfect for the actors' simultaneous emotional background; blank 3 requires imperfect as a continuing atmospheric detail; blank 4 requires preterite for the audience's bounded reaction.
  4. Blanks 1, 2, and 3 all require imperfect to establish layered background atmosphere, while blank 4 alone requires preterite because any audience reaction in a theatrical narrative constitutes a plot-advancing event and therefore cannot be expressed in imperfect regardless of its descriptive quality.
Explanation: When choosing between preterite and imperfect in Spanish narrative, ask yourself one key question for each verb: is this background description (setting the scene, describing states) or a plot-advancing event (something that happened and moved the story forward)? In this passage, the first two blanks describe conditions that existed when the story begins: the theater was full (estaba) and the actors were nervous (estaban). These are simultaneous background states — classic imperfect territory. Then "de repente" (suddenly) signals a shift: the lights went out and the audience reacted. These are discrete, completed actions that occur in sequence and push the narrative forward, making them preterite (se apagaron, aplaudió/reaccionó). That reasoning confirms B as correct. A is wrong because it treats the entire passage as uniformly descriptive. "De repente" is a major red flag — it almost always introduces a preterite event, not a lingering background state. You cannot blanket a whole passage in one tense based on general mood. C contains a plausible-sounding but false rule: lleno used predicatively does not force preterite. Estaba lleno is a perfectly natural imperfect description of a state. Calling blank 3 (lights going out) imperfect also contradicts how sudden, bounded events work. D invents an unsupported rule — that audience reactions in theatrical narratives are always preterite. Tense choice depends on grammatical aspect, not genre conventions. Your study tip: memorize "de repente" as a preterite trigger. It signals a sudden, completed event that interrupts ongoing background, which is the core distinction this question tests.

Question 6

Mientras (1)  por el mercado, de repente (2)  a mi antigua profesora de literatura. Ella (3)  una bolsa de verduras y (4)  con otra señora cuando la (5) .

Which sequence of verb forms correctly fills blanks (1) through (5) in the passage?

  1. (1) caminaba, (2) vi, (3) llevaba, (4) hablaba, (5) reconocí — imperfect for continuous background actions; preterite for the punctual events that interrupted them (correct answer)
  2. (1) caminé, (2) vi, (3) llevaba, (4) hablaba, (5) reconocí — preterite for the narrator's walking since it occurred once; imperfect for the professor's simultaneous states
  3. (1) caminaba, (2) veía, (3) llevó, (4) habló, (5) reconocí — imperfect for the background frame and for the moment of seeing; preterite for the professor's described activities
  4. (1) caminaba, (2) vi, (3) llevó, (4) habló, (5) reconocía — imperfect for the narrator's stroll; preterite for the sighting and the professor's actions; imperfect for recognition as a gradual mental process
Explanation: When you see a passage mixing past-tense verbs in Spanish, your first instinct should be to identify which actions are background/ongoing and which are completed/punctual interruptions — that distinction drives the preterite vs. imperfect choice entirely. In this passage, the narrator is strolling through the market (an ongoing, continuous activity — classic imperfect territory), so blank (1) takes caminaba. Then, suddenly, something cuts through that background: a specific, completed moment of spotting someone — blank (2) takes vi (preterite). The professor's carrying a bag and talking to another woman describe her simultaneous state at that moment, background conditions the narrator observed — so blanks (3) and (4) take llevaba and hablaba (imperfect). Finally, recognizing her was an instantaneous completed act — blank (5) takes reconocí (preterite). That logic points squarely to Answer A. Answer B fails because caminaba cannot be replaced with caminé — the narrator's walking was not a single completed event but the continuous backdrop the entire scene unfolds against. Answer C makes two errors: veía treats the moment of seeing as ongoing background rather than the sharp, punctual encounter it was, and llevó/habló wrongly assign preterite to the professor's simultaneous states, which had no defined endpoint. Answer D misapplies imperfect to reconocía — recognizing someone "at that instant" is a discrete completed act, not a gradual mental process, so it demands the preterite. A handy study tip: picture the imperfect as a movie playing in the background and the preterite as a camera flash — a sudden, frozen moment. Every time you choose a past tense, ask yourself which one you're dealing with.

Question 7

A narrator writes: 'Aquella tarde, Rodrigo no pudo terminar el informe porque su computadora se rompió.' A classmate argues that 'no pudo' should be replaced with 'no podía' because ability is a mental state and mental states always take imperfect. Which response most accurately evaluates this claim?

  1. The classmate is correct: poder describes an internal capacity, which is a stative mental condition. Stative verbs in past narration default to imperfect regardless of context, so 'no podía' is the grammatically required form — 'no pudo' produces a subtly ungrammatical sentence in standard written Spanish.
  2. The classmate's rule is partially correct but misapplied here: poder does often take imperfect for background ability, but 'no pudo' is appropriate in this sentence because it signals a specific, completed failed attempt — preterite of poder in the negative means 'failed to' or 'was unable to on that occasion,' which fits the bounded, event-driven context. (correct answer)
  3. The classmate is wrong because poder is not a mental-state verb; it is a modal auxiliary, and modal auxiliaries in Spanish categorically require preterite in past narration — they cannot appear in imperfect without producing an ungrammatical or stylistically marked sentence.
  4. The classmate's reasoning is sound in principle, but the conclusion is wrong: 'no podía' would be correct only if the sentence's subordinate clause also used imperfect, since Spanish sequence-of-tense rules require both the main clause and the 'porque' clause to share the same past aspect when describing the same event.
Explanation: When you see a question pitting preterite against imperfect with verbs like poder, querer, or saber, the real test isn't about verb categories — it's about what meaning each form creates. These verbs shift meaning depending on aspect, and that's exactly what's being tested here. In the sentence, Rodrigo's computer broke, creating a specific, bounded situation in which he attempted and failed to finish the report. That's the key insight behind answer B: the preterite no pudo doesn't just mean "was not able" in a general sense — it specifically signals a failed attempt on a particular occasion, often translated as "failed to" or "couldn't manage to." This fits perfectly with the event-driven, time-limited context the porque clause provides. A is wrong because the premise — that stative verbs always require imperfect — is an overgeneralization. Many stative or semi-stative verbs (poder, saber, querer) regularly appear in preterite to signal a completed episode or a change in state. No pudo is not ungrammatical here; it's precisely correct. C invents a false rule. Poder is not categorically restricted to preterite. No podía terminar is perfectly grammatical and common — it just conveys ongoing background inability rather than a specific failed attempt. D fabricates a "sequence-of-tense" matching rule that doesn't exist in Spanish. The tenses in a main clause and a porque clause are chosen independently based on aspect and meaning, not forced to agree with each other. Study tip: Memorize the "aspect shift" pairs — no podía = was unable to (background), no pudo = failed to (event). These high-frequency verbs almost always appear on aspect questions.

Question 8

A student translates the English sentence 'She knew the answer but didn't want to say it' into Spanish as: 'Ella sabía la respuesta pero no quiso decirla.' Which of the following analyses of this translation is most accurate?

  1. The translation is incorrect on both counts: 'sabía' should be 'supo' because knowledge of a specific answer at a specific moment reflects a punctual realization rather than a background state, and 'no quiso' should be 'no quería' because the reluctance to speak was an ongoing, simultaneous attitude rather than a discrete completed act.
  2. The translation is partially correct: 'sabía' is appropriate because knowing is a background mental state, but 'no quiso' should be 'no quería' because the sentence describes a simultaneous ongoing reluctance rather than a completed, discrete act of refusal — preterite implies too strong a volitional force.
  3. The translation is fully correct as written: 'sabía' captures the background state of knowing, while 'no quiso' captures the completed, volitional decision not to speak — the preterite of querer in the negative means 'refused' (a completed act), which precisely matches the English meaning of deliberately withholding the answer. (correct answer)
  4. The translation is partially correct: 'no quiso' is appropriate because refusing is a bounded volitional event, but 'sabía' should be 'supo' because the English phrase 'knew the answer' implies a specific moment of realization or discovery rather than a prolonged background state of knowledge already possessed.
Explanation: Whenever you translate a sentence with multiple verbs into Spanish, you need to analyze each verb independently: is it describing a background state (imperfect) or a completed, bounded event (preterite)? "Sabía" is the right choice for knowing because saber in the imperfect describes an ongoing mental state — the knowledge existed as a backdrop to the story, not as a sudden discovery. Meanwhile, "no quiso" is the right choice because the negative preterite of querer carries a very specific, idiomatic meaning: "refused" — a deliberate, completed volitional act. This is one of Spanish's most important aspectual nuances. Compare: no quería = "didn't want to" (ongoing feeling), versus no quiso = "refused to" (a concluded decision). The English "didn't want to say it" in this context implies a deliberate withholding, not merely a passive feeling — so the preterite captures the meaning precisely. Answer C is fully correct. Answer A is wrong on both counts. "Supo" would mean she found out or realized the answer at that moment — a punctual discovery, not prior knowledge. That misreads the sentence entirely. It's also wrong about "no quiso." Answer B correctly defends "sabía" but misidentifies "no quiso" as overly strong — in fact, that volitional force is exactly what the sentence requires. Answer D makes the opposite error: it correctly reads "no quiso" but wrongly pushes "sabía" toward "supo," again confusing background knowledge with a moment of discovery. Your study tip: memorize the preterite/imperfect meaning shifts for saber, querer, poder, and conocer — these verbs change meaning depending on tense, and exam questions almost always test them.

Question 9

Era medianoche cuando Sofía finalmente terminó de leer la carta. Las palabras la golpearon como un rayo. Durante años, ella creía que su madre nunca la había querido, pero ahora todo era diferente. Lloró durante horas.

A student identifies 'creía' in the third sentence as an error, arguing it should be 'creyó' because the belief is presented as something that is now recognized as false — a completed, bounded misconception that ended at the moment of reading. Which of the following responses most accurately evaluates this argument?

  1. The student is correct: when a past belief is revealed within the narrative to be false or to have ended, Spanish grammar requires preterite to mark the belief's completion and termination, clearly distinguishing it aspectually from beliefs that were true or that continue to hold beyond the narrative moment.
  2. The student is incorrect, but for a different reason: 'creía' must remain imperfect because creer is a purely stative verb that cannot appear in preterite in any narrative context — doing so would fundamentally alter the verb's lexical meaning to something unrecognizable and produce an ungrammatical or semantically incoherent sentence.
  3. The student is partially correct: 'creyó' would be required if the sentence contained 'de repente' or another punctual adverb marking a discrete moment of belief, but since the belief is described as lasting 'durante años,' the duration marker anchors it grammatically in imperfect regardless of whether the belief was ultimately shown to be false.
  4. The student is incorrect: 'creía' is appropriate because it describes a long-held background belief that existed across the years leading up to this moment — the imperfect conveys the belief's duration and its role as the emotional backdrop against which the revelation occurs; the fact that it turned out to be false does not change its aspectual framing as an ongoing past state. (correct answer)
Explanation: When you see a question about preterite vs. imperfect, train yourself to ask: What is the aspectual role of this verb in the narrative? Is it background state or completed event? That framing — not whether the content of the belief turned out to be true — determines which tense is correct. Here, creía describes a belief Sofía held continuously durante años — "for years." That duration signals an ongoing background state, exactly what the imperfect is designed to express. The belief functions as emotional scenery: it existed across the years leading up to the letter's revelation, providing the context that makes the discovery so devastating. D captures this perfectly. The imperfect's job is to paint the backdrop; whether that backdrop later proves false is a narrative detail, not a grammatical trigger. A is the central trap. It assumes that because the belief was revealed to be wrong, Spanish grammar retroactively recategorizes it as a completed event requiring preterite. This is false — aspect reflects how the speaker frames the action (ongoing vs. bounded), not whether the content was ultimately accurate or finite. B overstates the rule. Creer can appear in preterite (creyó) — it would shift meaning toward a momentary act of deciding to believe, which is unusual but grammatical. Calling it entirely impossible is incorrect. C introduces a false rule. While de repente often pairs with preterite and durante años pairs with imperfect, these are tendencies reflecting underlying aspect — not mechanical triggers that override all other considerations. Remember: Imperfect frames a past state as background or ongoing; preterite frames it as a discrete event. The truth value of the belief never changes this calculation.