English Grammar & Syntax Quiz: Correcting Modifier Errors
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Correcting Modifier ErrorsQuestion 1 of 10

The agency wants to explain that its clerks scan applications before assigning case numbers because the clerks hope to reduce processing time. Which revision corrects the modifier error and preserves that meaning?

To reduce processing time, applications are now scanned by clerks before receiving case numbers.
To reduce processing time, the clerks now scan applications before assigning them case numbers.
Applications are now scanned by clerks to assign case numbers before reducing processing time.
Applications are now scanned by clerks before being assigned case numbers to reduce processing time.
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English Grammar & Syntax Quiz

English Grammar & Syntax Quiz: Correcting Modifier Errors

Practice Correcting Modifier Errors in English Grammar & Syntax 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 Correcting Modifier Errors, giving you a quick way to practice the rules, question types, and explanations that matter most for English Grammar & Syntax.

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

The agency wants to explain that its clerks scan applications before assigning case numbers because the clerks hope to reduce processing time. Which revision corrects the modifier error and preserves that meaning?

  1. To reduce processing time, applications are now scanned by clerks before receiving case numbers.
  2. To reduce processing time, the clerks now scan applications before assigning them case numbers. (correct answer)
  3. Applications are now scanned by clerks to assign case numbers before reducing processing time.
  4. Applications are now scanned by clerks before being assigned case numbers to reduce processing time.
Explanation: When you see a phrase like "To reduce processing time" at the start of a sentence, you're dealing with a dangling modifier — one of the most frequently tested modifier errors. A modifying phrase must logically and grammatically connect to the subject of the main clause. Ask yourself: who is doing the action described in the modifier? Here, the agency wants to convey that the clerks are motivated to reduce processing time — they are the ones scanning applications with that goal in mind. Choice B correctly places "the clerks" immediately after the introductory phrase, so "To reduce processing time" clearly modifies the clerks. The sentence also preserves the intended sequence: clerks scan first, then assign case numbers. Choice A dangles the modifier onto "applications," making it sound like the applications themselves are trying to reduce processing time — applications can't have intentions. Choice C scrambles the meaning entirely, suggesting that scanning happens before reducing processing time as a step in a sequence, which misrepresents the agency's explanation. Choice D moves the modifier to the end ("to reduce processing time"), but it still attaches ambiguously to the passive construction — it's unclear whether the clerks, the scanning, or the case-number assignment is meant to reduce time, and the intended agent (the clerks) remains buried. B is correct because it names the clerks as the subject, directly anchoring the modifier and preserving the agency's full intended meaning. Study tip: Whenever you spot an infinitive phrase ("to do something") or a participial phrase at the start of a sentence, immediately identify who performs that action — that person or thing must be the grammatical subject of the main clause.

Question 2

Researchers interviewed forty residents and then wrote a report identifying three traffic hazards. Which sentence correctly attaches the introductory modifier to the people who conducted the interviews?

  1. Having interviewed forty residents, three traffic hazards were identified in the researchers' report.
  2. Having interviewed forty residents, the report identified three traffic hazards for the researchers.
  3. Having interviewed forty residents, the researchers wrote a report identifying three traffic hazards. (correct answer)
  4. Having interviewed forty residents, the researchers' report contained three identified traffic hazards.
Explanation: When you see a sentence beginning with a participial phrase like "Having interviewed forty residents," your first job is to ask: who performed that action? The subject immediately following the comma must be the person or thing the phrase describes. This is the rule of the dangling modifier — if the phrase doesn't logically attach to the subject that follows, the sentence is grammatically broken. In this question, it's the researchers who conducted the interviews, so "the researchers" must appear right after the comma. Choice C does exactly that: "Having interviewed forty residents, the researchers wrote a report identifying three traffic hazards." The participial phrase correctly modifies "the researchers," and the sentence flows logically. Choice A fails because "three traffic hazards" follows the comma — traffic hazards cannot interview residents. The modifier dangles. Choice B makes the same structural mistake in a different way: "the report" becomes the implied subject of the interviewing, but a report cannot conduct interviews. Choice D is a common trap — it places "the researchers" nearby, but the actual grammatical subject following the comma is "the researchers' report." Possessive nouns don't count; the report didn't interview anyone, so the modifier still dangles. A quick strategy: whenever you see an introductory participial phrase, immediately circle who or what comes right after the comma and ask whether that thing could realistically perform the action in the phrase. If not, the modifier is dangling. On grammar exams, possessive constructions like "the researchers' report" are a frequent trap designed to make the wrong answer feel close enough — don't fall for it.

Question 3

The sentence below contains a modifier error.

After reviewing the quarterly records, several unexplained discrepancies were found in the travel accounts.

Which revision most clearly indicates that the auditors reviewed the records and found the discrepancies?

  1. After reviewing the quarterly records, the auditors found several unexplained discrepancies in the travel accounts. (correct answer)
  2. After the quarterly records reviewed the accounts, several unexplained discrepancies were found by the auditors.
  3. After reviewing the quarterly records, several unexplained discrepancies appeared to the auditors in the travel accounts.
  4. After reviewing the quarterly records, the auditors' report contained several unexplained discrepancies in the travel accounts.
Explanation: When a sentence opens with a participial phrase like "After reviewing the quarterly records," that phrase must logically modify the subject of the main clause — whoever or whatever comes immediately after the comma. This is called a dangling modifier, and it's one of the most commonly tested errors in grammar and syntax. In the original sentence, "several unexplained discrepancies" follows the comma, which absurdly implies the discrepancies did the reviewing. The fix requires placing the logical actor — the auditors — right after that introductory phrase. Choice A does exactly this: "the auditors" immediately follows the comma, making it clear they reviewed the records and found the discrepancies. The sentence is active, logical, and correctly structured — this is your answer. Choice B introduces a new error entirely: "the quarterly records reviewed the accounts" is nonsensical, since records cannot perform reviews. It also distorts the meaning of the original. Choice C keeps the passive construction and still dangles the modifier. "Several unexplained discrepancies appeared to the auditors" places the discrepancies — not the auditors — as the subject following the phrase, so the modifier remains unattached to its intended actor. Choice D swaps "the auditors" for "the auditors' report," which doesn't fix the problem. A report cannot review records; the auditors can. This is a subtle trap because "auditors'" looks close to correct but changes the meaning in a way that reintroduces the logical error. Your strategy: whenever you spot an introductory participial phrase, immediately ask who is performing that action? That person or group must be the subject of the main clause.

Question 4

Nora handed Liam a telescope that had been wrapped in protective cloth. Which revision makes it clear that the cloth was around the telescope, not around either person?

  1. Wrapped in protective cloth, Nora handed the telescope to Liam.
  2. Nora, wrapped in protective cloth, handed the telescope to Liam.
  3. Nora handed the telescope to Liam, who was wrapped in protective cloth.
  4. Nora handed Liam the telescope, which was wrapped in protective cloth. (correct answer)
Explanation: When a sentence contains a descriptive phrase or clause, it must be anchored to the noun it actually describes. This question tests modifier placement — specifically, making sure a participial phrase or relative clause clearly refers to the intended noun rather than an ambiguous or wrong one. The original sentence is ambiguous because "wrapped in protective cloth" could plausibly describe the telescope, Nora, or even Liam depending on how the sentence is structured. Option D resolves this by using the relative clause "which was wrapped in protective cloth" immediately after "the telescope." In English, a relative clause beginning with which attaches directly to the noun just before it, so there's no ambiguity — the cloth is clearly around the telescope. Option A places "Wrapped in protective cloth" as an introductory participial phrase. Because it opens the sentence, it must describe the subject, which is Nora — so it sounds like Nora is wrapped in cloth. Option B makes the same error even more explicitly by inserting "wrapped in protective cloth" as a parenthetical directly beside Nora's name. Option C uses a relative clause ("who was wrapped in protective cloth") anchored to Liam via the pronoun who, which applies only to people — so this version wraps Liam in cloth instead. A useful rule to remember: relative clauses with which describe things; those with who describe people. When you need to clarify which noun a descriptive phrase modifies, place the phrase or clause directly beside that noun, and choose the correct relative pronoun for the type of noun involved.

Question 5

Mara submitted the draft on Tuesday to the finance committee and to no other committee. Which sentence places only so that it most clearly expresses this meaning?

  1. Only Mara submitted the draft to the finance committee on Tuesday.
  2. Mara only submitted the draft to the finance committee on Tuesday.
  3. Mara submitted only the draft to the finance committee on Tuesday.
  4. Mara submitted the draft only to the finance committee on Tuesday. (correct answer)
Explanation: When you see a question about placing the word only, you're being tested on modifier placement — specifically, how the position of only changes which part of a sentence it modifies. The rule is simple: only modifies the word or phrase that immediately follows it. So your job is to place only directly before the element you want to restrict. The meaning you're targeting is that the finance committee was the exclusive recipient — no other committee received the draft. That means only needs to immediately precede "to the finance committee." Answer D, "Mara submitted the draft only to the finance committee on Tuesday," does exactly this. The word only sits directly before "to the finance committee," signaling that this committee, and no other, received the draft. The other choices each shift the restriction to the wrong element. A places only before "Mara," implying she alone submitted the draft — focusing on the person, not the recipient. B places only before "submitted," suggesting she merely submitted rather than doing something else with the draft (like presenting or revising it) — an entirely different claim. C places only before "the draft," implying that the draft, not some other document, was submitted — again, a different meaning entirely. The strategy to remember: whenever a question asks you to express a very specific restrictive meaning, find the word or phrase that carries that meaning and place only directly before it. Read each answer choice aloud and ask, "What is only restricting here?" That single question will consistently guide you to the right answer.

Question 6

The engineers determined that the new sensor performed reliably, whereas the earlier sensor models did not. Which revision makes the intended comparison without creating a misplaced modifier?

  1. Unlike the earlier models, the engineers found that the new sensor performed reliably.
  2. The engineers, unlike the earlier models, found the new sensor performed reliably.
  3. The engineers found that the new sensor, unlike the earlier models, performed reliably. (correct answer)
  4. The engineers found reliable performance, unlike the earlier sensor models, in the new sensor.
Explanation: When a sentence contains a comparison, the comparing phrase must be placed immediately next to the element it's actually comparing. This question tests your ability to recognize misplaced modifiers — specifically, when a phrase like "unlike the earlier models" ends up next to the wrong noun, creating an illogical or unintended comparison. The sentence's core intent is to compare the new sensor to the earlier sensor models. Option C achieves this cleanly: "the new sensor, unlike the earlier models, performed reliably" places the comparative phrase directly beside "the new sensor," so the comparison is logically between two sensors. That's exactly what the sentence means to say. Option A fails because "Unlike the earlier models" opens the sentence and is followed immediately by "the engineers" — grammatically, this compares the engineers to the earlier sensor models, not the sensors to each other. That's a classic misplaced modifier. Option B makes the same error even more awkwardly: "the engineers, unlike the earlier models" explicitly states the engineers are being contrasted with the sensor models, which is nonsensical. Option D buries the comparison phrase between "reliable performance" and "the new sensor," making the sentence clunky and ambiguous — it's unclear what exactly is being compared to the earlier models. A reliable strategy: whenever you spot a comparative phrase like unlike X or similar to X, immediately ask yourself, "What two things are actually being compared, and are they sitting next to each other?" If the phrase is separated from the noun it should modify, the sentence has a misplaced modifier — and that's your red flag to eliminate it.

Question 7

Elena calibrated the device and then used it to record the readings. Which revision correctly expresses that sequence without allowing an introductory modifier to attach to the device?

  1. Before recording the readings, Elena calibrated the device. (correct answer)
  2. Before recording the readings, the device was calibrated by Elena.
  3. Elena calibrated the device, having already recorded the readings.
  4. After recording the readings, Elena calibrated the device.
Explanation: When a sentence opens with a participial or prepositional phrase ("Before recording the readings..."), that introductory modifier must logically attach to the subject of the main clause — whoever or whatever immediately follows the comma. This is the dangling modifier rule, and it's exactly what this question tests. Choice A is correct because the subject following the comma is Elena, the person who actually does the recording. The sentence reads "Before recording the readings, Elena calibrated the device" — Elena is the one recording, so the modifier attaches cleanly. The sequence is also preserved: calibrating happened before recording, which matches the original sentence. Choice B is the classic trap. It moves the device into the subject position ("the device was calibrated by Elena"), which means "the device" is now the thing implied to be "recording the readings." Devices don't record on their own here — Elena does — so this creates a dangling modifier. Passive voice is the culprit. Choice C reverses the chronology entirely. The original sentence says Elena first calibrated, then recorded. "Having already recorded the readings" implies recording came first, which contradicts the original meaning. Choice D makes the same chronological error as C. "After recording the readings, Elena calibrated the device" places calibration second, when the original places it first. Strategy tip: Whenever you see an introductory phrase, immediately ask: who or what comes right after the comma, and is that the logical actor in the phrase? If the subject can't perform the action in the modifier, the sentence has a dangling modifier — and on grammar exams, passive voice rewrites are a common way to create that error.

Question 8

A company intends to say that employees who submit expense reports on a regular basis are audited once every June. Which revision avoids placing regularly where it could modify the wrong action?

  1. Employees who submit expense reports are regularly audited during June.
  2. Employees who regularly submit expense reports are audited each June. (correct answer)
  3. Regularly, employees who submit expense reports are audited each June.
  4. Employees who submit regular expense reports are audited each June.
Explanation: When a modifier like regularly appears in a sentence, its meaning depends entirely on its placement — it will naturally attach to the nearest action or verb phrase. This question tests your ability to recognize modifier ambiguity and place an adverb where it modifies only the intended action. The company's intended meaning has two distinct ideas: (1) employees submit expense reports on a regular basis, and (2) those employees are audited once every June. The word regularly should describe the submitting, not the auditing. Choice B — "Employees who regularly submit expense reports are audited each June" — places regularly directly before submit, making it unambiguous that regular submission is what triggers the audit. The phrase "each June" separately conveys the once-a-year timing of the audit. This is your correct answer. Choice A places regularly before audited, which implies the auditing happens on a regular basis — the opposite of the intended meaning (auditing happens only once, each June). Choice C positions regularly at the very start of the sentence as a sentence-level adverb, which awkwardly suggests the entire situation recurs regularly rather than clarifying who submits regularly. Choice D swaps the adverb for the adjective regular, which now modifies expense reports themselves — meaning the reports are standard or routine in nature — rather than describing the frequency of submission. A helpful strategy: whenever you see an adverb like regularly, frequently, or often in an answer choice, ask yourself "what verb is this closest to, and is that the action it should describe?" Moving the modifier is almost always the fix.

Question 9

The curator displayed a recently restored portrait next to an antique cabinet; the cabinet itself had not been restored. Which sentence most clearly conveys this meaning?

  1. The curator displayed a portrait beside the antique cabinet that had recently been restored.
  2. Beside the recently restored antique cabinet, the curator displayed a portrait.
  3. The curator displayed a recently restored portrait beside the antique cabinet. (correct answer)
  4. Recently restored beside the antique cabinet, the portrait was displayed by the curator.
Explanation: When a question asks which sentence "most clearly conveys" a specific meaning, you're being tested on modifier placement — how the position of a descriptive phrase determines what it modifies. The golden rule: a modifier should sit as close as possible to the word it describes. The scenario tells you two things: the portrait was recently restored, and the cabinet was not. That means "recently restored" must clearly attach to "portrait" and nothing else. Option C — "The curator displayed a recently restored portrait beside the antique cabinet" — does exactly this. "Recently restored" sits directly before "portrait," leaving no ambiguity about what was restored. The cabinet is simply described as antique, with no restoration implied. Option A fails because the relative clause "that had recently been restored" follows "antique cabinet," making it sound like the cabinet was restored — the opposite of the intended meaning. This is a classic misplaced modifier trap. Option B places "recently restored" before "antique cabinet" at the very start of the sentence, which implies the cabinet is the restored object, again contradicting the scenario. Option D uses a dangling participial phrase — "Recently restored beside the antique cabinet" — which awkwardly and illogically suggests the restoring happened beside the cabinet, muddling the meaning entirely. Its passive construction also adds unnecessary confusion. The strategy here: whenever you see modifying phrases, trace what noun each one actually touches in the sentence as written, not as intended. Writers often know what they mean, but readers can only follow what's on the page. Ask yourself, "What does this phrase literally describe?" to catch these traps every time.

Question 10

The analyst finished most—but not all—of a set containing forty calculations before noon. Which sentence uses the limiting modifier to express that meaning unambiguously?

  1. The analyst nearly completed all forty calculations before noon.
  2. The analyst completed all of the nearly forty calculations before noon.
  3. The analyst completed nearly all forty calculations before noon. (correct answer)
  4. The analyst completed all forty calculations nearly before noon.
Explanation: Whenever you see a question about limiting modifiers — words like nearly, almost, only, just — your job is to check exactly which word or phrase the modifier is sitting next to, because its position determines its meaning. A limiting modifier restricts the word immediately following it. In this question, the target meaning is clear: the analyst finished most, but not all of the forty calculations. That means the modifier needs to limit the word all — suggesting incompleteness in the quantity completed, not in anything else. Choice C, "completed nearly all forty calculations," places nearly directly before all, which limits it perfectly. It tells you the analyst came close to completing all forty but didn't quite finish — exactly the intended meaning. This is your correct answer. Choice A says "nearly completed all forty," which places nearly before completed. This modifies the act of finishing, implying the analyst almost reached a state of completion — as if the process was barely started or the work was barely attempted, not that a specific count was left undone. Choice B, "all of the nearly forty calculations," moves nearly before forty, which now casts doubt on the count itself — suggesting there were approximately (but not exactly) forty calculations total. The number becomes uncertain, not the quantity finished. Choice D, "completed all forty calculations nearly before noon," places nearly before before noon, shifting focus entirely to the time frame. It implies the analyst did finish all forty, just barely before noon — the opposite of the intended meaning. Study tip: When placing a limiting modifier, mentally ask, "What am I casting doubt on?" Position the modifier immediately before that specific word.