12: isn't
13: doesn't rain
14: will buy
15: makes
16: wouldn't have felt
17: went
18: didn't drink
19: would have had
20: would have been
21: ask
22: hears
23: will let
24: comes
25: have
26: was
27: took
28: lost
29: exercised
*Cấu trúc câu điều kiện:
- Loại 1: If S + V(es/s - HTĐ), S + will/can/shall/..... + V_inf
- Loại 2: If S + V(ed - QKĐ), S + would/could/should/...... + V_inf
- Loại 3: If S + had + V(ed/C3), S + would have + V_ed/C3
