Interrogative Adverbs

Definition Of Interrogative Adverb:

Adverbs of Degree used in asking questions.

Example Sentences for Interrogative Adverb

Why are you late?
When did you come?
Where are you going?
Why did you go there?
Whence will the train arrive?

Learning Competency

Modal auxiliaries Vs Primary auxiliaries
Primary auxiliaries are be, do, have. They are used to form tenses and to frame short answers.
Modal auxiliaries are will, would, may, might, shall, should, can, could, must, dare, need, used, ought. They are used to express moods.