1.saw/was waiting

2.has taught/graduated

3.

4.have lived/broke

5.was

6.is coming

7.is playing/arrived

8.has done

9.were playing

10.met

11.did you do after you went 

12.told/visited

13.is cooking/cooks

14.have you study

15.comes

16.gives

17.

18.has circled

19have you seen

1.had seen-had been waiting(hoà hợp While QKTD-QKD  nhưng có yesterday thì lùi 1 thì QKHTTD-QKHT)

2.has taught-graduated( HTHT since QKD)

3.reported-had captured(yesterday)

4.have been living- broke

5.had been(for=> HTHT, last month=> QKHT)

6.is coming (mệnh lệnh thức)

7.was playing- arrived(QKTD-QKD...khi 1 hành động đang xảy ra thì hành động khác xen vào)

8.had done(QKHT before QKĐ)

9.were playing (câu 7)

10.met(ago..QKĐ)

11.did you do, had gone(QKĐ after QKHT)

12.told, visted(yesterday,1970)

13.is cooking(at present_HTTD)-cooks(always..HTD)

14.have you studied( how lòng...HTHT)

15.comes(HTD)

16.has given( up to now..HTHT)

17.sat,rested( câu 11)

18.circles(every, sự thật hiển nhiên)

19.have you seen(since)

Check giúp mình khi bạn chữa bài nhà.