Ex2:
1 works
2 invited
3 have
4 are playing
5 is washing
6 rains
7 likes
8 watches
9 will do
10 visit
Ex3:
1 for -> since
2. didn't go -> doesn't go
3. had been waiting -> were waiting
4. will have finished -> will finish
5. was walking -> walk
6. for -> since
7. went -> will go
8. are studying -> were study
9. had left -> leave
10. had seen -> seen
Ex2
1 works
2 invited
3 had
4 are playing
5 is washing
6 raining
7 likes
8 watches
9 will do
10 visit
Ex3
1 since => for
2 doesn't go => didn't go
3 were waiting => had been waiting
4 finish => finished (by tomorrow => thì tương lai hoàn thành: S + wil have + V3/ed)
5 walks => was walking
6 two years ago => two years
7 will go => went
8 are studying => studied
9 already leave => had already left
10 have => had (câu tường thuật => lùi thì, Hiện tại hoàn thành => Quá khứ hoàn thành)
Ex1
29 will have joined
30 starts
31 Does she visit
32 has lent
33 went
34 don't go
35 has lost
36 was singing - came
37 was reading - was watching
38 came - switched - checked
39 sneaked - stole - left
40 arrived - had been
