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INFINITIVE

The Infinitive is one of the "building blocks" of English, and we use it often; sometimes with "to" , and sometimes without "to".

We use it with auxiliary verbs, modal auxiliary verbs, certain other verbs and in some constructions.

Sometimes people have difficulty with the Negative Infinitive.


to work Present Infinitive
to have worked Perfect Infinitive
to be working Progressive Infinitive
to be told Passive Infinitive







with "to"





"I want to go."

OK



without "to"





(We also call this the "bare infinitive".)

"I must go."

OK



auxiliary verbs





...like "do, does, did", to make questions and negatives in the present and past:

Do you like? Does she like? Did he like?

I don't like. She doesn't like. I didn't like.

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modal auxiliary verbs





...like "can", "must", "would","need" etc

She can speak - We must go - They would like - I need to check

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certain other verbs





...like "promise", "ask", "agree", "learn" etc.

He promised to come - She asked me to stay - They agreed to work - I'm learning to speak English.

As you learn, you must pay attention to the form which follows certain verbs...

OK More



some constructions





You will find the Infinitive in many situations.

Note for the moment its use in Reported Speech and Obligation.

OK Reported Speech Obligation



Negative Infinitive





To be, or not to be? That is the question!

For example
I prefer not to travel by air.

to work, or not to work
to have worked, or not to have worked
to be working, or not to be working
to be told, or not to be told

OK