Study Materialnot having
Affirmative and Negative sentences
Formation of Interrogative sentences ?

An affirmative sentence is a positive sentence which affirms something. For example, I have a book. 

Negative Sentences state something that is not correct. It negates or invalidates a statement. For example, I do not have a book. We use  "No" and "Not" in negative sentences.

For formation of interrogative sentences, please refer to the topic "Framing Questions" under English Grammar Study Material.