2. Adverbs of place and motion; as, John stood there for an hour. They are going back.

Note.—The word there is sometimes used merely to introduce a sentence, that the subject may follow the verb; as, There are two boys in the room. When it is used in this manner it is called an expletive.

3. Adverbs of manner and quality; as, You did it well. That man acts foolishly.

4. Adverbs of degree and measure; as, He is quite ill. She is a very industrious woman.

5. Model adverbs—those that express certainty or uncertainty; as, I shall surely come. You are probably right.

EXERCISE.

How is each adverb used in the following sentences?—

1.This river flows rapidly.
2.I know how he acted.
3.Where is your father?

Classes of Adverbs according to their use:—

1. An adverb that simply modifies another word is called a simple adverb; as, Slowly and sadly we laid him down.