What is a verb?
Verbs are words that show an action (sing), occurrence (develop), or state of being (exist). Almost every sentence requires a verb. The basic form of a verb is known as its infinitive. The forms call, love, break, and go are all infinitives.
Almost all verbs have two other important forms called participles. Participles are forms that are used to create several verb tenses (forms that are used to show when an action happened); they can also be used as adjectives. The present participle always ends in -ing: calling, loving, breaking, going. (There is also a kind of noun, called a gerund, that is identical in form to the present participle form of a verb.) The past participle usually ends in -ed, but many past participles have irregular endings: called, loved, broken, gone.
The verb’s past tense usually has the same -ed form as the past participle. For many verbs, however, the past tense is irregular. An irregular past tense is not always identical to an irregular past participle: called, loved, broke, went.
The two main kinds of verbs, transitive verbs and intransitive verbs, are discussed at the entries for transitive and intransitive.