Introduction: A Verb is a word which affirms or predicts something of some person or thing, or a part of speech expressing being, action or the suffering of action.
Verbs are divided into two main classes - Principal and Auxiliary.
(i) When a verb is used independently, it is called a Principal Verb.
Call, go, work, etc.
(ii) When a verb is used only to help some other verb to form voices, moods and tenses, it is called an Auxiliary Verb. [Auxiliary means helping.] The only verbs that can be so used are - can, be, have, shall, will, may, do.
The classification of Verbs can be easily understood from the structure given below.
|Auxiliary Verbs||Main Verbs|
|Primary Modal||Intransitive Transitive|