Infinitive Verb - Definition, Types and Examples

Lesson Overview

• What Is an Infinitive Verb?
• Types of Infinitives
• Functions of Infinitives
• How Do You Use Infinitives in Sentences?
• Difference Between Infinitives, Participles, and Gerunds
• Infinitive Verb Examples
• Infinitive Verb Assessment

What Is an Infinitive Verb?

The infinitive definition is simple: it is the base form of a verb, often used with the word "to." It does not show tense or subject but is a versatile part of speech.

Example:

• To dance
• To explore
• To imagine

Infinitives are important because they allow us to express ideas clearly and add variety to our writing.

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Noun, Verb, Infinitive & Adjectival Phrases

Types of Infinitives

Infinitives come in two forms:

1. Full Infinitive
   This is the most common form, combining "to" with the base verb.
   Use: Commonly used after certain verbs, adjectives, or to show purpose
   Example: He loves to swim.
   
2. Bare Infinitive
   This form uses only the base verb, typically after modal verbs or "let" and "make."
   Use: Typically follows modal verbs (e.g., can, should), causative verbs (e.g., make, let), or verbs of perception (e.g., see, hear).
   Example: She can run fast.
   
   Now you know that understanding these forms of infinitives helps us use them effectively in speech and writing.

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-ing vs. to infinitive

Functions of Infinitives

Infinitives have three main roles:

1. As Nouns
   Infinitives act as the subject or object of a sentence.
   Example:
   • To learn is exciting.
   • She wants to help.
     
2. As Adjectives
   Infinitives describe nouns and provide more information.
   Example:
   • He has a project to complete.
     
3. As Adverbs
   Infinitives explain the purpose of an action.
   Example:
   • They worked hard to succeed.
     
     

How Do You Use Infinitives in Sentences?

Infinitives can appear in various parts of a sentence.
Examples:

• After a verb: She decided to travel.
• After an adjective: He was eager to learn.
• To explain purpose: They practice daily to improve.

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gerund or infinitive Quiz- fill in the correct form

Difference Between Infinitives, Participles, and Gerunds

Infinitive Verb Examples

Here are some more infinitive examples to show how infinitives work:

1. To learn a new skill is exciting.
2. She loves to paint landscapes during the weekend.
3. They decided to travel to Europe this summer.
4. He wants to improve his grades in math.
5. The teacher asked us to complete the assignment by Monday.
6. To exercise daily is beneficial for your health.
7. We need to save money for our trip.
8. The goal is to finish the project before the deadline.
9. He promised to help his friend with the homework.
10. She started to sing as soon as the music began.

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Gerund Or Infinitive Quiz Questions and Answers

Infinitive Verb Assessment

1. Identify the infinitive in this sentence: She loves to paint.
2. Write a sentence using an infinitive as an adjective.
3. Explain one function of an infinitive with your own example.