AFFIRMATIVE, You were singing He was singing
NEGATIVE, You weren't snging He wasn't singing
INTERROGATIVE, Were you singing? Was he singing?
AFFIRMATIVE, You will help He will help
NEGATIVE, You will not help He will not help
INTERROGATIVE, Will you help him later? Will he help me right now?
AFFIRMATIVE, You are going to leave He is going to leave
NEGATIVE, You are not going to leave He is not going to leave
INTERROGATIVE, Are you going to leave? Is he going to leave?
AFFIRMATIVE, You waited He waited
NEGATIVE, You didn't wait He didn't wait
INTERROGATIVE, Did you wait? Did he wait?
AFFIRMATIVE, You have been He has been
NEGATIVE, You haven't been He hasn't been
INTERROGATIVE, Have you been? Has he been?
AFFIRMATIVE, You run He runs
NEGATIVE, You do not run He do not runs
INTERROGATIVE, Do you run? Does you run?
AFFIRMATIVE, You are speaking He is speaking
NEGATIVE, You are not speaking He is not speaking
INTERROGATIVE, Are you speaking? Is he speaking?
EXAMPLES, I used to live in Paris. Sam and Mary used to go to Mexico in the summer. You used to play the piano.
ACTIVE, The professor teaches the sudents. Jonh washes the dishes.
PASSIVE, The students are taught by the professor. The dishes are washed by John.