Definition Of Interrogative Adverb:
Adverbs of Degree which are 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

E-mail so popular
E-mail is a precise and time-saving method to gather information. So, it is very popular