You felt unhappy yesterday,____?A.didn't you B.did you C.don't you D.do you

You felt unhappy yesterday,____?A.didn't you B.did you C.don't you D.do you

A、反意疑问句.主句是felt、所以是didn't you.

B
did you?

B.did you

B

B
unhappy 表否定，反义疑问句要肯定

A

B
虽然前面是felt,但是因为unhappy表否定，所以后面要用肯定
因为是昨天，所以是过去时，
选B