Infinitives worksheet for identifying infinitive verbs in sentences.

Let's solve this worksheet step by step.

What is an infinitive?

An infinitive is the base form of a verb, usually preceded by the word "to". For example: *to eat*, *to run*, *to be*. In some cases, especially after certain verbs (like *like*, *want*, *plan*, *ask*), the infinitive comes with "to". Sometimes, the infinitive appears without "to" when it follows certain verbs like *let*, *make*, or *help*.

We are asked to find the infinitive in each sentence and write it on the line.

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Now let’s go through each sentence:

1. He is learning to play the accordion.
→ The infinitive is to play

2. Jim doesn't like to share his cookies.
→ The infinitive is to share

3. Henry doesn't like to be around dogs.
→ The infinitive is to be

4. Sally refuses to get up before nine.
→ The infinitive is to get up

5. My mother asked me to do the dishes.
→ The infinitive is to do

6. That lady decided to cut her hair very short.
→ The infinitive is to cut

7. I wanted to have a word with you.
→ The infinitive is to have

8. Ann plans to graduate in May.
→ The infinitive is to graduate

9. Mary forgot to schedule the appointment.
→ The infinitive is to schedule

10. I asked George to turn off his phone.
→ The infinitive is to turn off

11. I told you to plug in the toaster.
→ The infinitive is to plug in

12. We will stop to grab a few things.
→ The infinitive is to grab

13. My cat likes to be ignored.
→ The infinitive is to be ignored

14. My sister refuses to go to the doctor.
→ The infinitive is to go

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✔ Final Answers:

1. to play
2. to share
3. to be
4. to get up
5. to do
6. to cut
7. to have
8. to graduate
9. to schedule
10. to turn off
11. to plug in
12. to grab
13. to be ignored
14. to go

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📝 Explanation:

- Infinitives often start with "to" + verb, but sometimes they appear in passive forms (e.g., *to be ignored*) or compound forms (*to get up*, *to turn off*).
- Even if the infinitive is part of a phrase (like "to get up"), we include the whole infinitive phrase.
- We look for the "to" + verb structure that functions as the object of a verb or follows a verb that takes an infinitive (like *like, want, plan, ask, decide*, etc.).

This worksheet helps students identify infinitives in context — a key grammar concept in English!