Bài 1:
(+)
I was at home yesterday.
I did homework yesterday morning.
I played badminton.
I played volleyball.
I watched TV.
I ate noodles.
I went to school.
I wrote an essay.
I won this game.
I cooked dinner.
(-)
I didn't be at home yesterday.
I didn't do homework yesterday morning.
I didn't play badminton.
I didn't play volleyball.
I didn't watch TV.
I didn't eat noodles.
I didn't go to school.
I didn't write an essay.
I didn't win this game.
I didn't cook dinner.
(?)
Did you do homework?
Did you eat pork?
Did you study English?
Did you go to school?
Did you cook dinner?
Did you play badminton?
Did you read comics?
Did you wash you clothes?
Did you see someone?
Did you search the Internet?