ACT Grammar Practice Questions with Answers

Mastering the English section of the ACT requires a deep understanding of standard written English conventions, ranging from simple punctuation to complex sentence structure. Success on this portion of the exam is not just about having an "ear" for what sounds right; it involves applying specific rules consistently across 75 questions in 45 minutes. This guide provides comprehensive ACT Grammar Practice Questions with Answers to help you identify common traps and improve your score through targeted practice.

Concept Explanation

ACT Grammar refers to the specific set of rules governing punctuation, usage, and sentence structure that the ACT English test evaluates to measure a student's proficiency in standard written English. To excel, students must navigate four primary categories: Punctuation, Grammar and Usage, Sentence Structure, and Rhetorical Skills. For instance, understanding the difference between a comma and a semicolon is vital; a semicolon connects two independent clauses, while a comma often separates a dependent clause from an independent one. Many students find that using an AI Question Generator helps them drill these specific rules until they become second nature. Beyond simple mechanics, the ACT also tests "conciseness," favoring the shortest grammatically correct answer that maintains the intended meaning. You can find more foundational strategies in our ACT Prep hub.

Topic	Key Rule
Commas	Use after introductory phrases or to set off non-essential information.
Semicolons	Connect two independent clauses without a conjunction.
Agreement	Verbs must match subjects in number; pronouns must match antecedents.
Apostrophes	Use for possession or contractions, never for simple plurals.

Solved Examples

Reviewing these solved examples will help you understand how the ACT applies grammar rules in context. For additional practice on related sections, check out ACT English Practice Questions with Answers.

1. Subject-Verb Agreement: The group of students (is/are) going to the museum.
   Solution:
   1. Identify the subject. The subject is "group," which is a singular collective noun.
   2. Ignore the prepositional phrase "of students."
   3. The singular verb "is" matches the singular subject "group."
   4. Correct Answer: is.
2. Punctuation (Semicolons): I wanted to go for a run; however, it started to rain.
   Solution:
   1. Check if the clauses on both sides of the punctuation can stand alone.
   2. "I wanted to go for a run" is an independent clause.
   3. "however, it started to rain" is also an independent clause.
   4. A semicolon is appropriate to join two independent clauses.
   5. Correct Answer: run; however,
3. Pronoun Case: The award was given to Sarah and (I/me).
   Solution:
   1. Identify the role of the pronoun. It follows the preposition "to," making it an object.
   2. Remove the other person ("Sarah") to test the sentence: "The award was given to me."
   3. "Me" is the objective case pronoun.
   4. Correct Answer: me.

Practice Questions

Test your skills with these ACT-style grammar questions. If you find the math section equally challenging, you might also enjoy our guide on ACT Math Practice Questions with Answers.

1. The chef, along with his assistants, prepare the meal for the gala every year.

2. My sister is a talented musician she plays both the violin and the cello.

3. After finishing the marathon, the water tasted better than anything I had ever drank.

4. The dogs' collars were all custom-made with their names engraved in silver.

5. Neither the manager nor the employees was aware of the new policy change.

6. The novel was interesting, but, it was also quite long and difficult to finish.

7. To find the treasure, one must follow the map careful.

8. The committee that consists of ten members meet every Thursday afternoon.

9. Having studied for weeks, the final exam was much easier than I expected.

10. The historical museum, which was founded in 1924, houses thousands of artifacts.

Answers & Explanations

1. Answer: prepares. The subject is "The chef," which is singular. The phrase "along with his assistants" is a parenthetical phrase and does not change the number of the subject.
2. Answer: musician; she. This is a comma splice/run-on error. Two independent clauses must be separated by a semicolon, a period, or a comma plus a coordinating conjunction (FANBOYS).
3. Answer: I thought the water tasted. This is a dangling modifier. "After finishing the marathon" describes a person, but the subject following it is "the water." The water didn't finish the marathon.
4. Answer: dogs'. The sentence mentions "collars" (plural) and "their names" (plural), indicating there is more than one dog. For plural nouns ending in 's', the apostrophe goes after the 's'.
5. Answer: were. When using "neither/nor," the verb must agree with the subject closest to it. "Employees" is plural, so the verb must be "were."
6. Answer: interesting, but. Commas should not surround "but" in this context. A comma should precede the coordinating conjunction "but" when it joins two independent clauses.
7. Answer: carefully. The word modifies the verb "follow," so it must be an adverb. Most adverbs end in "-ly."
8. Answer: meets. The subject is "The committee," a collective noun that is treated as singular in this context. Therefore, the verb should be "meets" rather than "meet."
9. Answer: I found the final exam much easier than expected. Similar to question 3, this is a dangling modifier. "Having studied for weeks" describes a person, not the exam itself.
10. Answer: No Change. The phrase "which was founded in 1924" is a non-essential clause and is correctly set off by commas.

1. Which of the following correctly uses a semicolon?

• AI like apples; and oranges.
• BThe weather was beautiful; we decided to have a picnic.
• CBecause it was raining; we stayed inside.
• DShe bought; milk, bread, and eggs.

Frequently Asked Questions

What are the most common grammar rules on the ACT?

The most common rules tested include subject-verb agreement, pronoun-antecedent agreement, comma usage (especially with non-essential clauses), and the proper use of semicolons versus colons. Additionally, the ACT frequently tests "conciseness," requiring students to choose the most direct way to state an idea.

How is the ACT English section different from the SAT Writing section?

While both tests cover similar grammar rules, the ACT English section moves at a faster pace, with 75 questions in 45 minutes compared to the SAT's slower timing. The ACT also tends to focus more on specific punctuation rules and rhetorical skills like sentence placement and passage logic. For more on logic-based questions, see our ACT Word Problems Practice Questions.

Can I use my "ear" to answer ACT grammar questions?

Using your "ear" can be helpful for identifying obvious errors, but it often fails on more formal rules like "whom vs. who" or dangling modifiers. It is much safer to learn the formal rules of English grammar to ensure accuracy on the trickier questions designed by the ACT.

What is a dangling modifier on the ACT?

A dangling modifier occurs when a descriptive phrase at the beginning of a sentence does not logically refer to the subject that follows it. For example, in "Walking down the street, the trees were beautiful," the trees aren't walking; the sentence must be rewritten to include a human subject. Many students find that using an AI Exam Simulator helps them recognize these patterns quickly.

How do I handle "No Change" questions?

"No Change" is the correct answer approximately 25% of the time on the ACT English section. You should treat it as a valid option and only select an alternative if you can identify a specific grammatical error or a more concise way to express the thought. For more practice with varied difficulty, explore Medium ACT Math Practice Questions.