Practice Infinitive Exercises: Rules, Usage, and Answers

When learning English grammar, infinitives play an important role, and they are often confusing for you. You may have come across sentences such as “I want to learn English” or “She likes to read books” and wondered why “to + verb” is used. These forms are called infinitives, and they help express purpose, intention, and actions clearly. In this guide, you will learn what infinitives are, their rules and usage tips, along with infinitive exercises and answers to help you understand them better. 

Table of Contents

• What is an Infinitive?
• Infinitive Rules and Usage Tips
• Infinitives Exercises with Answers
• Exercise 1: Fill in the Blanks
• Exercise 2: Combine Sentences Using Infinitives
• Exercise 3: Choose the Correct Infinitive Form

What is an Infinitive? 

An infinitive is the base form of a verb, usually used with “to”, such as to run, to eat, or to learn. It can act as a noun, adjective, or adverb in a sentence. Sometimes, the verb is used without "to", called a bare infinitive, as in “She can run.”

Infinitive Rules and Usage Tips

Infinitives are verb forms that use “to + base verb” (like “to read" and “to play”) and help show purpose, intention, or action in a sentence.

• Use “to + base verb” (e.g., to read, to play) to express purpose or intention.
  Example: She likes to dance. 

• Use infinitives after certain verbs like want, need, decide, and plan.
  Example: I want to learn English.

• Use them after adjectives (e.g., happy to help, easy to learn).
  Example: It is easy to understand.

• Use infinitives to express purpose.
  Example: He studies to pass the exam.

• Some verbs take bare infinitives (without “to”), such as make, let, and help.
  Example: She made me finish the work. 

• Avoid using infinitives incorrectly as the main verb without proper sentence structure.
  Example: She wants to go to school.
  
  

Infinitives Exercises with Answers

Practice identifying and using infinitives correctly with simple exercises and clear answers. These activities help improve understanding of “to + base verb,” sentence formation, and correct usage in everyday English.

Exercise 1: Fill in the Blanks

Fill in each blank with the correct verb form using an infinitive or a bare infinitive where needed.

1. She wants ________ (learn) French.

2. I decided ________ (buy) a new laptop.

3. She promised ________ (call) me later.

4. I would rather ________ (stay) at home than go out.

5. He went to the library ________ (study).

6. My parents made me ________ (finish) my homework.

7. We hope ________ (visit) the museum tomorrow.

8. She seems ________ (understand) the concept clearly.

9. He forgot ________ (bring) his notebook.

10. The teacher told us ________ (complete) the assignment.

11. He tried ________ (open) the door quietly.

12. I would like ________ (improve) my English skills.

13. She asked me ________ (help) her with the project.

14. We need ________ (finish) this work on time.

15. The manager allowed the staff ________ (leave) early.

16. She encouraged me ________ (participate) in the competition.

17. I am happy ________ (see) you again.

18. They expect ________ (win) the match.

19. He offered ________ (carry) my bag.

20. The coach made the players ________ (practice) harder.

21. They plan ________ (start) a new business.

22. It is important ________ (follow) the rules carefully.

23. It is easy ________ (solve) this problem.

24. He was too tired ________ (continue) the journey.

25. They were the first team ________ (reach) the finals.

Answers: 

1. She wants to learn French.

2. I decided to buy a new laptop.

3. She promised to call me later.

4. I would rather stay at home than go out.

5. He went to the library to study.

6. My parents made me finish my homework.

7. We hope to visit the museum tomorrow.

8. She seems to understand the concept clearly.

9. He forgot to bring his notebook.

10. The teacher told us to complete the assignment.

11. He tried to open the door quietly.

12. I would like to improve my English skills.

13. She asked me to help her with the project.

14. We need to finish this work on time.

15. The manager allowed the staff to leave early.

16. She encouraged me to participate in the competition.

17. I am happy to see you again.

18. They expect to win the match.

19. He offered to carry my bag.

20. The coach made the players practice harder.

21. They plan to start a new business.

22. It is important to follow the rules carefully.

23. It is easy to solve this problem.

24. He was too tired to continue the journey.

25. They were the first team to reach the finals.

Exercise 2: Combine Sentences Using Infinitives

Combine each pair of sentences using an infinitive (to + base verb).

1. She went to the market. She wanted to buy vegetables.

2. He studies every day. He wants to become a doctor.

3. I called her. I wanted to invite her to the party.

4. They are saving money. They want to travel abroad.

5. He opened the window. He wanted to let in fresh air.

6. She works hard. She wants to achieve her goals.

7. We went to the library. We wanted to find some books.

8. He spoke softly. He didn’t want to wake the baby.

9. I exercise daily. I want to stay healthy.

10. She wore a jacket. She didn’t want to feel cold.

11. He took a taxi. He didn’t want to be late.

12. She saved her notes. She wanted to revise later.

13. They practised daily. They wanted to win the match.

14. I switched off the lights. I wanted to save electricity.

15. He hurried. He wanted to catch the train.

16. She whispered. She didn’t want to disturb anyone.

17. They left early. They wanted to avoid traffic.

18. He trained regularly. He wanted to improve his performance.

19. I studied all night. I wanted to pass the exam.

20. She stayed quiet. She didn’t want to create any problems.

21. He closed the door. He didn’t want to make noise.

22. She saved money. She wanted to buy a new phone.

23. They woke up early. They wanted to catch the sunrise.

24. I practised speaking. I wanted to improve my fluency.

25. He checked the map. He didn’t want to get lost.

Answers:

1. She went to the market to buy vegetables.

2. He studies every day to become a doctor.

3. I called her to invite her to the party.

4. They are saving money to travel abroad.

5. He opened the window to let in fresh air.

6. She works hard to achieve her goals.

7. We went to the library to find some books.

8. He spoke softly so as not to wake the baby.

9. I exercise daily to stay healthy.

10. She wore a jacket so as not to feel cold.

11. He took a taxi not to be late.

12. She saved her notes to revise later.

13. They practised daily to win the match.

14. I switched off the lights to save electricity.

15. He hurried to catch the train.

16. She whispered not to disturb anyone.

17. They left early to avoid traffic.

18. He trained regularly to improve his performance.

19. I studied all night to pass the exam.

20. She stayed quiet not to create any problems.

21. He closed the door not to make noise.

22. She saved money to buy a new phone.

23. They woke up early to catch the sunrise.

24. I practised speaking to improve my fluency.

25. He checked the map not to get lost.

Exercise 3: Choose the Correct Infinitive Form

Choose the correct form of the verb in each sentence.

1. She decided ________ (to go / go) to the party.

2. I made him ________ (to finish / finish) his homework.

3. They want ________ (to travel / travel) abroad next year.

4. He let me ________ (to use / use) his phone.

5. We hope ________ (to win / win) the match.

6. She asked me ________ (to help / help) her.

7. The teacher made us ________ (to write / write) an essay.

8. He promised ________ (to call / call) me later.

9. I would like ________ (to learn / learn) Spanish.

10. She helped me ________ (to carry / carry) the bags.

11. He plans ________ (to start / start) a business.

12. They allowed us ________ (to enter / enter) the room.

13. She encouraged me ________ (to participate / participate) in the event.

14. I heard him ________ (to sing / sing) in the room.

15. We need ________ (to complete / complete) this task soon.

16. She was the first person ________ (to arrive / arrive) at the venue.

17. He is too tired ________ (to continue / continue) working.

18. I would rather ________ (to stay / stay) at home.

19. It is important ________ (to follow / follow) the instructions.

20. They seem ________ (to understand / understand) the lesson clearly.

Answers: 

1. She decided to go to the party.

2. I made him finish his homework.

3. They want to travel abroad next year.

4. He let me use his phone.

5. We hope to win the match.

6. She asked me to help her.

7. The teacher made us write an essay.

8. He promised to call me later.

9. I would like to learn Spanish.

10. She helped me carry the bags.

11. He plans to start a business.

12. They allowed us to enter the room.

13. She encouraged me to participate in the event.

14. I heard him sing in the room.

15. We need to complete this task soon.

16. She was the first person to arrive at the venue.

17. He is too tired to continue working.

18. I would rather stay at home.

19. It is important to follow the instructions.

20. They seem to understand the lesson clearly.