The Infinitive Form

The INFINITIVE form of a verb is the form which follows to:

to ask to believe to cry to go

to protect to sing to talk to wish

This form is indistinguishable from the base form. Indeed, many people cite this form when they identify a verb, as in "This is the verb to be", although to is not part of the verb.

Infinitives with to are referred to specifically as TO-INFINITIVES, in order to distinguish them from BARE INFINITIVES, in which to is absent:

To-infinitive	Bare infinitive
Help me to open the gate	Help me open the gate

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More Verb Forms: -ing and -ed

So far we have looked at three verb forms: the present form, the past form, and the infinitive/base form. Verbs have two further forms which we will look at now.

[1] The old lady is writing a play [2] The film was produced in Hollywood

The verb form writing in [1] is known as the -ing form, or the -ING PARTICIPLE form. In [2], the verb form produced is called the -ed form, or -ED PARTICIPLE form.

Many so-called -ed participle forms do not end in -ed at all:

The film was written by John Brown The film was bought by a British company The film was made in Hollywood

All of these forms are called -ed participle forms, despite their various endings. The term "-ed participle form" is simply a cover term for all of these forms.

The -ed participle form should not be confused with the -ed inflection which is used to indicate the past tense of many verbs.

We have now looked at all five verb forms. By way of summary, let us bring them together and see how they look for different verbs. For convenience, we will illustrate only the third person singular forms (the forms which agree with he/she/it) of each verb. Notice that some verbs have irregular past forms and -ed forms.

Base/Infinitive Form	Present Tense Form	Past Tense Form	-ing Form	-ed Form
cook	he cooks	he cooked	he is cooking	he has cooked
walk	he walks	he walked	he is walking	he has walked
take	he takes	he took	he is taking	he has taken
bring	he brings	he brought	he is bringing	he has brought
be	he is	he was	he is being	he has been

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