Adverb.An adverb is a word which
adds to the meaning of a verb an
adjective or another adverb.

Sponsored Links

He laughed heartily.
He is an exceptionally bright student.
He is walking very slowly,
In these sentences heartily,exceptionally
and very modify the meanings of laugh,a verb,
bright,and slowly,an adverb respect very.

Sometimes,an adverb modifies the whole
adverbs phrase or clause:

He went straight into the room.
Here straight modifies the adverb phrase into the room.
I shall help him only when he asks for it.

In this sentences only modifies the whole
adverbial clause when he asked for it.

sometimes the adverb modifies the whole sentence.

Now the time has come for you to tell the truth.