15 could they
16 do you
17 was there
18 need I
19 was it
20 did you
21 will it
22 does she
23 did it
24 should he
25 could she
26 are you
27 would you
28 had he
29 were they
Câu hỏi đuôi ở trước là khẳng định thì vế sau là phủ định.
Câu hỏi đuôi ở trước là phủ định thì vế sau là khẳng định.