Regular and Irregular Verbs

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Verbs are subdivided into two groups, regular verbs and irregular verbs, on the basis of how their past tense and past participles are formed. See below for tips on how to distinguish between them.

:: Regular Verbs
Most verbs are regular verbs. Regular verbs are those whose past tense and past participles are formed by adding a -d or an -ed to the end of the verb. “To roll” is a good example of a regular verb:

roll, rolled, rolled

Sometimes the last consonant must be doubled before adding the -ed ending. For example:

plan, planned, planned

:: Irregular Verbs
There is no formula to predict how an irregular verb will form its past-tense and past-participle forms. There are over 250 irregular verbs in English. Although they do not follow a formula, there are some fairly common irregular forms. Some of these forms are:

break, broke, broken
cut, cut, cut
run, ran, run
meet, met, met
come, came, come
repay, repaid, repaid
swim, swam, swum
be was/were been

:: Distinguishing Regular and Irregular Verbs
Dictionaries are perhaps the most valuable tool one can use in distinguishing between regular and irregular verbs. If only one form of the verb is listed, the verb is regular. If the verb is irregular, the dictionary will list the principal parts of the other forms.