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An infinitive is a type of verbal—a verb form that looks like a verb but does not act as the verb in a sentence.
An infinitive is the basic form of a verb, usually with to in front of it: to go, to stay, to be. Infinitives act as nouns, adjectives or adverbs:
An infinitive phrase is an infinitive with attached words. Because an infinitive is formed from a verb, it retains some of the properties of a verb, so it can take an object:
Like a verb, an infinitive can also be modified by an adverb or a prepositional phrase:
In the above examples, to leave the concert, to exit quickly and to reach the exit from here are all infinitive phrases.
Infinitive phrases may have their own subjects. The subject of an infinitive phrase is in the object form:
Sometimes the word to is left out:
An infinitive without to is called a bare infinitive.
We can change the form of the infinitive to show different times:
Infinitives can also be used in the passive voice:
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