Lấy 3 ví dụ ở thể (+) rồi chuyển sang (-) và (?) .Chỉ đặt câu hỏi

example:

1.(+) I am watching a film now.

(-) I am not watching a film now.

(?) are you watching a film?

2.(+) I am a student.

(-) I am not a student.

(?) are you a student?

3.(+) I did my homework.

(-) I didn't my homework.

(?) did you do your homework?

(+) I am a pupil.

(-) I am not a pupil.

(?) Am I a pupil?

________________

(+) She is doing her homework.

(-) She isn't doing her homework.

(?) Is she doing her homework?

_______________

(+) They do exercise every day.

(-) They don't do exercise every day.

(?) Do they do exercise every day?