Essential vs. Nonessential Clauses Quiz with Answers: Test Your Comma Knowledge

📚 Quick Study Guide

• 🔑 Essential clauses are necessary to the meaning of the sentence. They are NOT set off by commas. Think of them as vital information.
• ✏️ Nonessential clauses add extra information but aren't crucial to the sentence's core meaning. They ARE set off by commas. These are like bonus details.
• 🔎 To determine if a clause is essential, try removing it. If the sentence still makes sense without it, the clause is nonessential and needs commas.
• ✍️ Relative pronouns (who, whom, which, that, whose) often introduce these clauses. 'That' usually indicates essential clauses, while 'which' often indicates nonessential clauses (but not always!).
• 💡Remember: Commas change the meaning! Using them correctly makes your writing clearer and more professional.

Practice Quiz

1. Which sentence correctly uses commas with a nonessential clause?
   1. A. The book that I borrowed from the library is overdue.
   2. B. The book, which I borrowed from the library, is overdue.
   3. C. The book which I borrowed from the library is overdue.
   4. D. The book; which I borrowed from the library, is overdue.
2. Identify the sentence where the clause is essential and commas are unnecessary.
   1. A. Students, who study hard, often succeed.
   2. B. The car, that I want to buy, is too expensive.
   3. C. The car that I want to buy is too expensive.
   4. D. Students who study hard, often succeed.
3. Choose the sentence with correct punctuation for a nonessential appositive phrase functioning as a nonessential clause.
   1. A. My sister, a talented artist is exhibiting her work.
   2. B. My sister a talented artist, is exhibiting her work.
   3. C. My sister, a talented artist, is exhibiting her work.
   4. D. My sister a talented artist is exhibiting her work.
4. Which sentence uses commas correctly with a nonessential clause starting with 'which'?
   1. A. The house, which is painted blue, is for sale.
   2. B. The house which is painted blue is for sale.
   3. C. The house; which is painted blue, is for sale.
   4. D. The house: which is painted blue, is for sale.
5. In which sentence is the clause introduced by 'that' correctly punctuated (or not punctuated)?
   1. A. The movie, that I saw last night, was amazing.
   2. B. The movie that I saw last night was amazing.
   3. C. The movie; that I saw last night, was amazing.
   4. D. The movie: that I saw last night, was amazing.
6. Select the sentence that demonstrates correct comma usage with a nonrestrictive (nonessential) clause.
   1. A. The teacher that gave the lecture was very knowledgeable.
   2. B. The teacher, that gave the lecture, was very knowledgeable.
   3. C. The teacher who gave the lecture, was very knowledgeable.
   4. D. The teacher, who gave the lecture, was very knowledgeable.
7. Which of the following sentences correctly uses commas to set off a nonessential clause?
   1. A. My dog who loves to play fetch is a golden retriever.
   2. B. My dog, who loves to play fetch, is a golden retriever.
   3. C. My dog who loves to play fetch, is a golden retriever.
   4. D. My dog, who loves to play fetch is a golden retriever.