English Grammar - Infinitive

 

English Grammar

Infinitive 

In English grammar, the infinitive is the base form of a verb, typically preceded by the word "to." It is called the infinitive because it is not limited by tense, person, or number. The infinitive is commonly used to express the idea of an action or state without specifying when or by whom it occurs.

Here are some examples of infinitives in English:

 

To walk: She loves to walk in the park every morning.

To eat: I want to eat a slice of pizza.

To sleep: It's important to sleep at least eight hours a night.

To read: He likes to read novels in his free time.

To sing: They plan to sing at the concert next week.

To study: We need to study for the upcoming exam.

To travel: My dream is to travel the world someday.

To write: She decided to write a book about her experiences.

 

In these examples, the infinitives are used as the main verbs in their respective sentences. They express the action or state being described without specifying who is performing the action or when it occurs.

 

It's important to note that the word "to" is not always required before an infinitive. In some cases, the infinitive can be used without "to" after certain verbs, such as "let," "make," "help," and "watch."

For example:

Let me go.

She made him clean the room.

I watched her perform on stage.

He helps his sister with her homework.

 

In these sentences, the verbs "go," "clean," "perform," and "help" are infinitives used without the word "to."

Use of Infinitives

Infinitives have various uses in English grammar. Here are some common ways in which infinitives are used:

 

As the base form of a verb: The infinitive is the most basic form of a verb, and it is often used as the main verb in a sentence.

For example:

She wants to learn how to play the piano.

I need to finish my homework.

 

After certain verbs: Some verbs are followed by an infinitive without the word "to." These include verbs like "let," "make," "help," "watch," and "hear."

For example:

Let me explain it to you.

He made me apologize to her.

They watched him perform on stage.

 

After adjectives: Infinitives can follow certain adjectives to express purpose or intention.

For example:

She is happy to see her friends.

It's important to be kind to others.

He was eager to start his new job.

 

After nouns or pronouns: Infinitives can function as nouns themselves or be used after nouns or pronouns.

For example:

Her goal is to become a doctor.

I have no time to waste.

It's a pleasure to meet you.

 

In infinitive phrases: Infinitives can be used in phrases to provide additional information about the main verb or noun in a sentence.

For example:

She went to the store to buy some groceries.

He worked hard to achieve his goals.

They gathered around the bonfire to sing songs.

 

In passive constructions: Infinitives can be used in passive voice constructions to express actions done to the subject.

For example:

The car needs to be repaired.

The book was written by a famous author.

 

These are some of the common uses of infinitives in English grammar. They allow us to express a variety of meanings and convey different purposes in our sentences.

Rules

Use "to" before the base form of the verb to form the infinitive in most cases:

Examples: to walk, to eat, to sleep, to study

 

Use the infinitive as the main verb in a sentence to express an action or state:

Example: She wants to learn how to play the piano.

 

Some verbs are followed by an infinitive without "to." These include verbs like "let," "make," "help," "watch," and "hear":

Examples: Let me go. He made her laugh.

 

Infinitives can be used after certain adjectives to express purpose or intention:

Examples: It's important to be kind. She is eager to start.

 

Infinitives can be used after nouns or pronouns to provide additional information or express purpose:

Examples: His goal is to succeed. I have no time to waste.

 

Infinitives can be used in infinitive phrases, where the infinitive is part of a larger phrase providing additional information or purpose:

Example: She went to the store to buy some groceries.

 

Infinitives can be used in passive voice constructions to express actions done to the subject:

Example: The car needs to be repaired.

 

When a verb follows "to" directly, it is known as the bare infinitive and is used after certain verbs like "can," "should," "must," and "will":

Examples: She can swim. You should study.

 

Remember that the use of infinitives can vary depending on the context and sentence structure. It's essential to pay attention to the specific rules and patterns in different situations.

 

Additionally, it's worth noting that in some cases, the infinitive marker "to" can be omitted, especially in casual or informal speech. However, for formal or written English, it is generally recommended to include the "to" before the infinitive verb.

Exercises

1

Complete the sentences by adding the appropriate infinitive form of the verb in brackets.

I love __________ (read) books in my free time.

They decided __________ (go) to the beach for their vacation.

Please remember __________ (turn) off the lights before leaving the room.

He offered __________ (help) me with my math homework.

She hopes __________ (find) a new job soon.

 

2

Rewrite the sentences using an infinitive phrase.

She studied hard. She wanted to pass the exam.

She studied hard __________.

They saved money. They wanted to buy a new car.

They saved money __________.

He woke up early. He intended to catch the first bus.

He woke up early __________.

We practiced every day. We aimed to win the competition.

We practiced every day __________.

She wrote a letter. She needed to apologize.

She wrote a letter __________.

 

Answers:

Exercise 1:

I love to read books in my free time.

They decided to go to the beach for their vacation.

Please remember to turn off the lights before leaving the room.

He offered to help me with my math homework.

She hopes to find a new job soon.

 

Exercise 2:

She studied hard to pass the exam.

They saved money to buy a new car.

He woke up early to catch the first bus.

We practiced every day to win the competition.

She wrote a letter to apologize.

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