Giải thích các bước giải:
Ex1:
1: goes
2: Are, doing
3: Is raining
4: Do, go
5: Cooking
6: Does, listen
7: Is Knocking
8: Does
9: Is
10: Like, don't like
Ex2:
1: Isn't working, is swimming
2.: Is teaching
3: Isn't wearing
4: Is flying
5: Is doing, is cleaning
6: Is going, is bringing
7: Is it raining, is raining
8: Are mending
9: Aren't telling, am not telling
10: Is moving, is painting
11: Is sweeping
12: Are reading, am reading
13: Is shining, are singing
14: Is knocking, am coming - washing
15: Ringing, asking
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