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Phrase

Infinitive Phrase: Definition and Examples

In this article, you will learn about infinitive phrases. It covers the definition, components, and different types of infinitive phrases. With example sentences, it aims to make learning English grammar easier for you.

Infinitive Phrase

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Infinitive Phrase Definition

We can only understand what an infinitive phrase is by first understanding the meaning of the term infinitive. An infinitive is formed from a verb but functions as a noun, adverb, or adjective. It is composed of two words, “to” and “a verb”. The two words function as a noun, adverb, or adjective. Let’s look at the infinitive examples as a noun, adverb, and adjective.

  • I love to fish in the lake. (noun)
  • She studied hard to pass the exam. (adverb)
  • He is the best person to lead the team. (adjective)

What Is An Infinitive Phrase?

An infinitive phrase is a multi-word that begins with the infinitive. An infinitive phrase, just like infinitives, can function as a noun, adverb, or adjective in a sentence. When functioning as a noun, infinitive and infinitive phrases can appear as subjects, objects (in this case direct), or predicate nominatives.

Here are examples of infinitive phrases:

  • To clean kitchen utensils.
  • To go on holiday.
  • I told the candidates to revise thoroughly.
  • I want to walk home quickly.

Components of An Infinitive Phrase

Infinitive phrases start with an infinitive, and at times take in modifiers and objects to make them more meaningful.

Infinitive

An infinitive is the main component of an infinitive phrase. In simple terms, an infinitive is a word β€œto” alongside a verb. Below are the examples to illustrate what it means:

  • To walk (to +walk)
  • To go (to +go)
  • To drink (to +drink)
  • To watch (to +watch)

Infinitives are spoken words describing an action and should not be mistaken with a prepositional phrase that starts with the word β€œto” alongside a noun or a pronoun.

Objects

An object can be a noun or a pronoun that receives the action of a verb. In an infinitive phrase, an object is a word that receives the action of the infinitive. The following are examples of infinitive phrases containing objects.

  • To play football.
  • To watch a movie.
  • To attend the class.
  • To eat mangoes.

Modifiers

A modifier can be an adjective or adverb that modifies other words in a sentence, making it more expressive. Let’s look at examples of infinitive phrases comprising of modifiers.

  • To walk majestically. Here the adjective modifies β€œto walk.”
  • To learn advanced computing. Here the adjective modifies β€œcomputing.”
  • To play music loudly. Here the adverb modifies β€œto play”

Types of Infinitive Phrases

Infinitive phrases are easy to identify since they start with the word β€œto.” They can function as a noun, adjective, or adverb in a sentence.

Infinitive Phrase As a Noun

The infinitive phrase answers the question β€œwhat?” when functioning as a noun. In such a case, the infinitive phrase will be the subject which can also be a verb or an object which the verb exerts its action on. The following are the examples:

  • I don’t like her. What don’t you like? (Object)
  • He needs to do well in his final test. What does he need? (Object)
  • My objective is to succeed. What is your objective? (Subject)
  • Her role was to guide me in designing the software. What was her role? (Object)

Infinitive Phrase As An Adjective

When an infinitive phrase functions as an adjective in a sentence. It modifies a noun or a pronoun. This means that it will modify either a subject or an object. Below are the examples:

  • I need a helper to assist me with house chores. Describes the helper
  • I wish I had a lover to keep me company. Describes the lover.

An Infinitive Phrase As An Adverb

When an infinitive phrase takes the role of a verb, it describes the verb in a sentence. Here the infinitive phrase will answer questions such as β€œwhy,” “when,” β€œhow,” and so on.

Examples of infinitive phrase as an adverb:

  • To qualify to be a teacher, you need a good recommendation. Why do you need a good recommendation?
  • I left school early to welcome my younger sister. Why did you leave early?
B1 Knowledge Check Β· 5 questions

Infinitive Phrase Practice Quiz (B1-B2)

1 / 5
Q1

Question 1: She decided ___ a new language before her trip abroad.

Question 1 options
'To learn' is correct because an infinitive phrase is formed with 'to' + base verb. 'Learning' is a gerund, 'learned' is past tense, and 'learns' is a conjugated verb β€” none of these form an infinitive phrase.
Q2

Question 2: In the sentence 'He trained hard to win the championship,' what role does the infinitive phrase 'to win the championship' play?

Question 2 options
'To win the championship' acts as an adverb because it answers the question 'Why did he train hard?' Infinitive phrases functioning as adverbs typically explain a reason or purpose for the action in the main clause.
Q3

Question 3: Customer: 'Why did you call the technician?' Shop owner: 'I called him ___ the broken machine in the back room.'

Question 3 options
'To fix' is correct because the infinitive phrase 'to fix the broken machine' acts as an adverb answering 'why' the shop owner called the technician. This expresses purpose, which is a key use of infinitive phrases as adverbs.
Q4

Question 4: We are looking for a volunteer ___ the new students around the campus.

Question 4 options
'To guide' is correct because the infinitive phrase 'to guide the new students around the campus' functions as an adjective modifying the noun 'volunteer', describing what kind of volunteer is needed. The other options do not form a correct infinitive phrase.
Q5

Question 5: Match each sentence to the correct grammar label.

Question 5 options
To travel the world is her biggest dream.
He bought a notebook to record his ideas.
She is the best person to lead the project.
They want to finish the assignment before noon.
Infinitive phrase as an adjective (modifying noun)
Infinitive phrase as a noun (subject)
Infinitive phrase as a noun (direct object)
Infinitive phrase as an adverb (purpose)

Select an item on the left, then tap its match on the right.

Infinitive phrases can function as nouns (subject or object), adjectives (modifying nouns), or adverbs (explaining reason/purpose for an action).

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