I can't understand action and auxillary verb nicely ,can anyone explain it to me. If videos will be there then it will be easy to understand.

Verbs that tell us about performing of an action by a doer or the subject are called action verbs.

For example:  sleep, brush, eat, drink, etc. 

Verbs that do not show an action are generally defined as auxiliary verbs.

For example: is, am, was, were, etc.

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