chuyển  câu chủ động sang câu bị động ở thì hiện tại tiếp diễn:
1.they are playing games in the yard now 
2.Are they playing games in the yard now ?
3. they aren't playing games in the yard now 
4. my mother is watching a film on TV at the moment
5.my mother isn't watching a film on TV at the moment
6.Is your mother  watching a film on TV at the moment ?
7.she is cooking lunch for her children
8.they aren't preparing the wedding 
9.Are your children  singing an English song
10.I am playing football now
11.they are studying English in the classroom
12.A cat is chasing after a mouse
13.the boy is watering some trees in the garden
14.he isn't washing his car
15.my mother is cooking meal at the time
16.the workers are painting the house now
17.the students are doing exercises on passive forms
18.Lan isn't reading books at the moment
19What are you doing at the moment ?
20.Is Tom making a toy now ?
21. Are the workers building the school now?
22.What is the teacher writing on the board ?