In the English language, there are three different verb forms that can be used to indicate action. These forms are known as the V1, V2, and V3 forms.

The V1 form is used to indicate the present tense, the V2 form is used to indicate the past tense, and the V3 form is used to indicate the future tense.

Each of these forms has its own set of rules regarding how it should be conjugated.

For regular verbs, the V1, V2, and V3 forms are simply the base form of the verb with -ed added for regular past tense verbs (e.g., work-worked-will work).

However, for irregular verbs, the forms are more complicated and often have multiple spellings (e.g., run-ran-run).

In addition to the three main verb forms, there are also a number of auxiliary verbs that can be used to modify the meaning of a sentence. The most common auxiliary verbs are have, be, and do.