1. 1. 

(-) I am not doing my homework.

(?) Are you doing your homework?

2. 2. 

(-) She isn't playing the piano in her room.

(?) Is she playing the piano in her room?

3. 3. 

(-) They aren't coming tomorrow

(?) Are they coming tomorrow?

4. 4. 

(-) My sister isn't helping me with my homework?

(?) Is your sister helping you with your homework?

5. 5. 

(-) I am not trying to study because tomorrow I don't have an exam.

(?) Are you trying to study because tomorrow I have an exam?

6. 6. 

(-) She isn't speaking English with her friends.

(?) Is she speaking English with her friends?

7. 7. 

(-) My brothers aren't typing the letters very fast.

(?) Are your brothers typing the letters very fast?

- Cấu trúc hiện tại tiếp diễn: 

(+) I+ am+ Ving

      He/ she/it/ Danh từ số ít+ is+ Ving

      We/ you/ they/ Danh từ số nhiều+are+ Ving

(-)  I+ am not+ Ving

      He/ she/it/ Danh từ số ít+ isn't+ Ving

      We/ you/ they/ Danh từ số nhiều+aren't+ Ving

(?)   Am+ I+ Ving?

      Is+ he/ she/it/ Danh từ số ít+ Ving?

      Are+ we/ you/ they/ Danh từ số nhiều+ Ving?