Bạn tham khảo :
1.don't they
2.isn't she ( is not she (
3.will they
4.isn't it
5.are there
6.doesn't he ( does not he )
7.wouldn't he ( would not he )
8.are they
9.have you
10.isn't it ( is not it )
11.can't they ( can not they )
12.did they
13.did it
14.aren't I ( are not I )
15.is it
16.aren't they ( are not I )
17.have you
18.was it
19.hadn't he
20.didn't you.