Adult ESL/ELL Intermediate Quiz: Using Relative Clauses
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Using Relative ClausesQuestion 1 of 10

A teacher gives students this sentence to correct: 'The movie which I watched last night it was very exciting.'

The sentence contains TWO errors related to relative clause structure. Which answer identifies BOTH errors correctly?

'Which' should be replaced with 'that,' and a comma should be added before 'which' to mark it as a non-restrictive clause.
'Which' should be replaced with 'who' because it refers to an experience, and 'it' should be removed to avoid a redundant subject pronoun.
'Which' is perfectly correct here and needs no change; only 'it' must be removed to fix the double-subject error in the main clause.
'Which' should be replaced with 'that' because the clause is restrictive and has no commas, and 'it' should be removed because it repeats 'the movie' as a redundant subject, making the main clause grammatically incorrect.
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Adult ESL/ELL Intermediate Quiz

Adult ESL/ELL Intermediate Quiz: Using Relative Clauses

Practice Using Relative Clauses in Adult ESL/ELL Intermediate 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 Using Relative Clauses, giving you a quick way to practice the rules, question types, and explanations that matter most for Adult ESL/ELL Intermediate.

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

A teacher gives students this sentence to correct: 'The movie which I watched last night it was very exciting.'

The sentence contains TWO errors related to relative clause structure. Which answer identifies BOTH errors correctly?

  1. 'Which' should be replaced with 'that,' and a comma should be added before 'which' to mark it as a non-restrictive clause.
  2. 'Which' should be replaced with 'who' because it refers to an experience, and 'it' should be removed to avoid a redundant subject pronoun.
  3. 'Which' is perfectly correct here and needs no change; only 'it' must be removed to fix the double-subject error in the main clause.
  4. 'Which' should be replaced with 'that' because the clause is restrictive and has no commas, and 'it' should be removed because it repeats 'the movie' as a redundant subject, making the main clause grammatically incorrect. (correct answer)
Explanation: When you see a sentence with a relative clause, check for two things: (1) whether the relative pronoun is the right choice, and (2) whether the main clause is grammatically complete on its own after the clause ends. In "The movie which I watched last night it was very exciting," the relative clause "which I watched last night" modifies "the movie" by restricting which movie we mean — it's not just any movie, but specifically the one watched last night. Restrictive relative clauses don't use commas and typically use "that" rather than "which" in standard American English. So "that" is the better choice here. The second error is the word "it" — after the relative clause ends, "the movie" is still the subject of the main clause. Writing "it was very exciting" adds a second subject that repeats "the movie," which creates an ungrammatical double-subject construction. Remove "it," and the sentence reads correctly: "The movie that I watched last night was very exciting." This confirms D is right. A is wrong because adding a comma would make the clause non-restrictive, changing the meaning and creating a different grammatical problem rather than fixing one. B incorrectly suggests replacing "which" with "who" — "who" refers to people, not movies, so that substitution makes no sense here. C is a trap: it correctly identifies the "it" error but claims "which" needs no change. While "which" isn't always wrong, recognizing the restrictive nature of this clause is part of the question, and C misses that entirely. Your study tip: always ask yourself, "Does this relative clause restrict which specific thing we mean?" If yes, no commas, use "that." Then scan for a repeated subject after the clause — that extra pronoun must go.

Question 2

A student asks: 'Can I use BOTH "that" and "which" to describe a thing, like a car or a book?' Which answer MOST accurately describes how these pronouns work at the intermediate level?

  1. 'That' and 'which' mean the same thing for objects and can always be used interchangeably, so the choice between them never affects grammar or meaning.
  2. 'That' is used only for living things like animals and plants, while 'which' is used for non-living objects like furniture or machines, regardless of clause type.
  3. 'That' is used in restrictive clauses that identify which specific thing is meant, while 'which' is typically used in non-restrictive clauses set off by commas that add extra detail about something already identified. (correct answer)
  4. 'Which' is always more formal and should replace 'that' in all written sentences, while 'that' is reserved only for spoken conversation and informal messages.
Explanation: When you see a question about "that" vs. "which," the key is understanding clause type, not the object being described. Both words can refer to things like cars or books, but they signal very different relationships between the information and the noun. The concept being tested is the difference between restrictive and non-restrictive relative clauses. A restrictive clause identifies which specific thing you mean — it's essential to the sentence's meaning. A non-restrictive clause adds bonus detail about something already clearly identified. Answer C captures this perfectly: "that" belongs in restrictive clauses (The car that broke down was mine — telling you which car), while "which" typically introduces non-restrictive clauses set off by commas (My car, which is red, broke down — the car is already identified; the color is just extra information). Answer A is tempting but wrong — swapping "that" and "which" does affect meaning and punctuation. They are not freely interchangeable. Answer B invents a rule that doesn't exist in English grammar; "that" and "which" have nothing to do with whether something is living or non-living. Answer D exaggerates formality into a false absolute — "that" appears regularly in formal writing, and replacing every "that" with "which" would actually create grammatical errors. A helpful tip: look for commas. If you see commas surrounding the clause, "which" is likely correct. No commas? "That" is usually the right choice. This comma-check strategy works reliably at the intermediate level and beyond.

Question 3

Read the following sentences and decide which one adds detail correctly using a relative clause:

  1. 'She adopted a dog that has three legs.'

  2. 'She adopted a dog which it has three legs.'

  3. 'She adopted a dog who has three legs.'

  4. 'She adopted a dog, that has three legs.'

Which sentence is grammatically correct AND uses the most appropriate relative pronoun for the context?

  1. Sentence 2, because 'which' is the correct pronoun for animals and 'it' clarifies what the clause refers to.
  2. Sentence 3, because 'who' is the most appropriate pronoun for an adopted pet since the owner has a personal connection to the animal.
  3. Sentence 4, because the comma before 'that' marks it as extra information about the dog and follows the non-restrictive clause rule.
  4. Sentence 1, because 'that' correctly introduces a restrictive clause identifying which dog she adopted, and the clause has no grammatical errors. (correct answer)
Explanation: When you see a question like this, think about two things: which relative pronoun fits the noun being described, and whether the clause is grammatically complete on its own. A relative clause adds detail about a noun using pronouns like that, which, or who. In Sentence 1, "that has three legs" tells us which specific dog she adopted — this is called a restrictive clause because it restricts or identifies the noun. The pronoun "that" is standard and correct for this purpose, and the clause is clean with no extra words. Sentence 1 is grammatically perfect, making D the correct answer. Here's why the others fail. A is wrong because "which it has three legs" contains a double subject — you cannot use both "which" AND "it" to refer to the same noun in one clause. Choose one or the other. B is tempting but incorrect. While "who" can be used informally for animals with whom we feel a close bond, this usage is considered informal or stylistic, not the grammatically standard choice on a grammar exam. The question asks for most appropriate, and "that" remains the conventional standard for animals in formal writing. C is wrong because placing a comma before "that" is a grammar error. The pronoun "that" is only used in restrictive (no-comma) clauses. If you want a non-restrictive clause with a comma, you must use "which" — for example, "She adopted a dog, which has three legs." A quick tip to remember: "that" = no comma (restrictive), "which" = comma (non-restrictive). Mixing these up is one of the most common errors on grammar questions, so knowing this rule will serve you well.

Question 4

A student writes an email to her professor: 'Dear Professor, I am writing about the assignment. The assignment is due Friday. I have a question about the section. We discussed the section in class on Monday.'

The student wants to rewrite the email using relative clauses to make it more fluent and professional. Which version BEST achieves this goal?

  1. Dear Professor, I am writing about the assignment which is due Friday. I have a question about the section which we discussed in class on Monday. (correct answer)
  2. Dear Professor, I am writing about the assignment that it is due Friday. I have a question about the section that we discussed it in class on Monday.
  3. Dear Professor, I am writing about the assignment, that is due Friday, and I have a question about the section who we discussed on Monday in class.
  4. Dear Professor, I am writing about the assignment due which Friday. I have a question about the section, which we discussed in class on Monday, and that is important.
Explanation: When combining choppy sentences in academic writing, relative clauses are a powerful tool — but only when formed correctly. A relative clause uses words like which, that, or who to connect information about a noun without repeating it. The key rules are: use which or that for things, who for people, and never repeat the noun or pronoun inside the clause itself. Answer A is the best choice because it correctly combines each pair of sentences using which as the relative pronoun. "The assignment which is due Friday" and "the section which we discussed in class on Monday" are both grammatically clean, professional, and natural-sounding. No words are repeated unnecessarily, and the meaning is perfectly clear. Answer B contains a classic error called a pronoun repetition mistake. Writing "the assignment that it is due Friday" repeats the subject (it) inside the relative clause — you only need one subject. The same error appears with "the section that we discussed it." Drop the extra pronoun. Answer C misuses that with a comma, which is incorrect — that introduces restrictive relative clauses and should not be set off by commas. It also uses who to refer to a section (a thing, not a person), which is a pronoun-noun agreement error. Answer D scrambles the word order in "due which Friday," making it grammatically impossible. It also adds information ("that is important") not found in the original, changing the meaning of the email. As a study tip: whenever you write a relative clause, check that you haven't left a repeated pronoun inside it — that single mistake appears frequently on grammar questions like this one.

Question 5

A student writes this paragraph about her job: 'I work at a hospital. The hospital is downtown. The doctors are very experienced. The doctors work there. They treat many patients every day.'

Which revision BEST uses relative clauses to combine these ideas into a fluent, grammatically correct paragraph without losing any information?

  1. I work at a hospital which it is downtown. The doctors who they work there are very experienced and treat many patients every day.
  2. I work at a hospital that is downtown. The doctors who work there are very experienced and treat many patients every day. (correct answer)
  3. I work at a hospital, that is downtown. The doctors, who they work there, are very experienced and treat many patients every day.
  4. I work at a hospital which downtown is. The doctors that work there, who are very experienced, treat many patients every day.
Explanation: When combining sentences with relative clauses, you need two things: the correct relative pronoun (who, that, which) and the right sentence structure — no doubled subjects, no misplaced words. Answer B gets both right. "A hospital that is downtown" correctly uses that to introduce information about the hospital. "The doctors who work there" correctly uses who for people. Notice that after the relative pronoun, the sentence continues naturally — no repeated subject, smooth word order, and all original information is preserved. Answer A makes a classic mistake called the "double subject error." Writing "which it is downtown" and "who they work there" adds an extra pronoun (it, they) after the relative pronoun. The relative pronoun already does the job of that pronoun — you never need both. This is one of the most common errors ESL learners make. Answer C uses commas incorrectly. When a relative clause is essential (it identifies which hospital or which doctors), you do not use commas. Writing "a hospital, that is downtown" is also grammatically wrong — that cannot follow a comma in a relative clause. C also repeats the double-subject error with "who they." Answer D scrambles the word order. "A hospital which downtown is" puts the adjective phrase in the wrong position, making it unnatural and confusing in English. Your study tip: after writing a relative clause, check two things — (1) Did I accidentally add an extra pronoun after who/that/which? (2) Is my word order natural? If yes to both, your clause is likely correct.

Question 6

Read these two sentences:

  1. 'The book that I borrowed from the library is due tomorrow.'

  2. 'My favorite book, which I borrowed from the library, is due tomorrow.'

Which statement BEST explains the grammatical difference between the relative clauses in sentences 1 and 2?

  1. Sentence 1 uses 'that' because the clause is essential for identifying which book is meant, while sentence 2 uses 'which' with commas because the book is already identified and the clause adds extra information. (correct answer)
  2. Sentence 1 uses 'that' because it refers to a borrowed item, while sentence 2 uses 'which' because it refers to a favorite item, and the pronoun choice depends on the speaker's feelings toward the object.
  3. Sentence 1 uses 'that' to show the action happened in the past, while sentence 2 uses 'which' with commas to show that the action is still ongoing and has present relevance.
  4. Sentence 1 uses 'that' because it is informal English, while sentence 2 uses 'which' because it is formal English, and the commas in sentence 2 indicate a more polite or academic register.
Explanation: When you see a question comparing relative clauses with "that" versus "which," the key concept to focus on is the difference between restrictive and non-restrictive clauses — in other words, whether the clause is essential or just extra information. In sentence 1, "that I borrowed from the library" is a restrictive clause. It's essential because without it, you wouldn't know which book is due tomorrow — it identifies the specific book being discussed. "That" signals this essential role, and notice there are no commas separating it from the noun. In sentence 2, "My favorite book" is already fully identified by the phrase "my favorite." The clause "which I borrowed from the library" simply adds bonus information — remove it, and the sentence still tells you exactly which book. The commas around the clause signal that it's non-essential. This is exactly what answer A describes, making it correct. Answer B is wrong because the choice between "that" and "which" has nothing to do with the speaker's emotional relationship to the object — feelings toward a book don't determine grammar rules. Answer C is wrong because both clauses use the same past tense verb ("borrowed"), so the pronoun choice has no connection to tense or ongoing action. Answer D is wrong because "that" versus "which" is not about formality level — both can appear in formal or informal writing depending on whether the clause is restrictive or not. A quick tip to remember: commas = extra info = "which"; no commas = essential info = "that." If you can remove the clause without losing the identity of the noun, use "which" with commas.

Question 7

Maria is describing her new neighborhood to a friend. She says: 'I live near a bakery   opens at 6 a.m. every day. The owner,   name is Carlos, makes fresh bread in the morning. There is also a park nearby   has a small pond.'

Which set of relative pronouns correctly completes all three blanks in Maria's description, in order?

  1. which, whose, that
  2. that, whose, which (correct answer)
  3. who, that, which
  4. that, who, whose
Explanation: When filling in relative pronouns, you need to ask yourself two questions about each blank: What is the pronoun referring to (a person or a thing?), and what grammatical role does it play in the clause (subject, object, or possessor)? In Maria's description, the first blank refers to "a bakery" — a thing — acting as the subject of the clause "opens at 6 a.m." Both that and which can refer to things, so either could work here. The second blank refers to the owner's name, meaning you need a possessive pronoun — only whose fits this role, regardless of whether the reference is a person or thing. The third blank refers to "a park" — again a thing — acting as the subject of "has a small pond." Again, that or which works. Answer B (that, whose, which) correctly uses that for the first thing-reference, whose for possession, and which for the final thing-reference — making it the correct answer. Choice A (which, whose, that) is grammatically possible but not the best fit here — more importantly, exam questions at this level typically expect that for restrictive clauses identifying which specific place is meant, and which for additional, non-essential information. Choice C (who, that, which) fails immediately because who refers to people, not places like a bakery. Choice D (that, who, whose) breaks down at the second blank — who cannot show possession; that role belongs to whose. Your study tip: memorize this quick rule — who = people, which/that = things, whose = possession for either. When you see a blank after a noun, identify what type of noun it is before choosing your pronoun.

Question 8

A student wants to combine these two sentences into one using a relative clause: 'I have a neighbor. She grows vegetables in her garden every summer.' Which option creates the MOST grammatically correct and natural combined sentence?

  1. I have a neighbor which she grows vegetables in her garden every summer.
  2. I have a neighbor, that grows vegetables in her garden every summer.
  3. I have a neighbor who grows vegetables in her garden every summer. (correct answer)
  4. I have a neighbor grows who vegetables in her garden every summer.
Explanation: When combining two sentences using a relative clause, your job is to replace the repeated noun (the person or thing you're describing) with the right relative pronoun and place it immediately after the noun it describes. The key question to ask is: who or what am I describing, and which pronoun fits? Since the neighbor is a person, the correct relative pronoun is who — not which or that (in formal written English, that is generally avoided with people in non-restrictive clauses). In option C, "who" directly replaces "she," connecting the two sentences smoothly: I have a neighbor who grows vegetables in her garden every summer. The pronoun "who" already acts as the subject of the relative clause, so you don't need to repeat "she." This is why C is correct. Option A fails for two reasons: which is used for things, not people, and it keeps "she" — you never need both the relative pronoun and the original subject pronoun together. Option B uses that with a comma, which creates a problem — when you use a comma before a relative clause (making it non-restrictive), standard grammar requires who for people, not that. Option D scrambles the word order entirely, placing who after "grows" instead of directly after "neighbor," making the sentence unreadable. A helpful tip: whenever you're combining sentences about a person, default to who. For things or animals, use which or that. And remember — once you use a relative pronoun, drop the original pronoun (she, he, they) from the clause entirely.

Question 9

Which sentence uses a relative clause INCORRECTLY?

  1. The scientist who discovered this medicine received a major award last year.
  2. The report that the manager submitted was reviewed by the entire board.
  3. The students who studied together passed the difficult exam with high scores.
  4. The computer which my colleague she uses every day needs to be repaired soon. (correct answer)
Explanation: When using relative clauses in English, the key rule to remember is that a relative clause already contains its own subject — the relative pronoun (who, that, which) is the subject. This means you should never add a second subject immediately after it. Sentence D is the incorrect one: "The computer which my colleague she uses every day needs to be repaired soon." The problem is the pronoun "she" after "my colleague." Since "which" introduces the relative clause, adding "she" creates a double subject — the clause now has two subjects doing the same job. The correct version would be: "The computer which my colleague uses every day needs to be repaired soon." Drop "she," and the sentence works perfectly. Sentences A, B, and C are all correct. In A, "who discovered this medicine" properly modifies "the scientist," with "who" acting as the subject of the clause. In B, "that the manager submitted" correctly modifies "the report," with "the manager" as the subject and "that" as the object — no doubling occurs. In C, "who studied together" correctly modifies "the students," following the same clean structure as A. A useful strategy: whenever you see a relative clause (look for who, that, which), trace the clause and ask, "Does it have two subjects?" If yes, one of them needs to go. A common trap for intermediate learners is translating directly from languages that allow double subjects in relative clauses — English does not. Train yourself to spot that extra pronoun.

Question 10

A student writes: 'The man which helped me find the library was very kind.' What is the BEST revision of this sentence using a correct relative clause?

  1. The man that helped me find the library, which was very kind.
  2. The man who helped me find the library was very kind. (correct answer)
  3. The man, who helped me find the library that was very kind.
  4. The man which was very kind helped me find the library.
Explanation: When choosing relative clauses, the key question is: what kind of noun are you describing? English uses different relative pronouns depending on whether the noun refers to a person or a thing. For people, use who or whom. For things or places, use which or that. The original sentence uses which to describe "the man" — a person — which is the core error to fix. Answer B corrects this perfectly: "The man who helped me find the library was very kind." The pronoun who refers to a person ("the man"), the relative clause "who helped me find the library" properly modifies that noun, and the main clause "was very kind" completes the sentence with a clear subject and verb. Every part does its job correctly. Answer A creates a broken sentence by cutting off the main verb. After "The man that helped me find the library," we expect a verb telling us what the man did — but instead it adds a second relative clause, leaving the sentence without a complete thought. Answer C has a similar structural problem: the clause "who helped me find the library" is interrupted before the main verb can appear, and "that was very kind" is awkwardly attached to "library" instead of the man. Answer D keeps the original error (which for a person) and just rearranges the clauses without fixing anything. A quick study tip: whenever you see a relative clause question, identify the noun being described first. Ask yourself, person or thing? Person → use who. Thing → use which or that. This simple check will help you catch errors quickly.