5. Tom (see) saw a serious accident white he (stand) was standing at the bus stop
6.While my lather (read) was reading a newspaper, (learn) was learning my tesson and my sister (do) her homework
7. The children (play) was playing foothall when their mother (come) came hack home.
S. The bell (ring) rang while Ton (take) was taking a bath
9.I (be) was very tired because I (work) was working all day yesterday.
10. He (sit) was sitting in a cafe when I (see) saw him
17. QKD-QKHT

1. They (go) went home after they (finish) have finished their work.
2. She said that she (already, see) already had seen Dr. Rice.
3. When we came to the stadium, the match (already, begin) had already begun
4. They told me they (not, eat) hadn't eaten such kind of food before
5. He (ask) asked a why me (come)came so early.
6. After they had gone, I (sit) sat down and (rest).rested
7. Before she (watch) watched TV, she (do) had done her homework.
8. After taking a bath, he (go)had gone to bed.
9. What (be) had been he when he (be) was young?
10. It was the first time I (ever, see) have ever seen such a beautiful girl.

VII. QKD-QKTD-QKHT(bài này em hiểu nghĩa nên em dịch cho luôn nhé)
1/ Yesterday John (go) had gone to the store before he (go) went home.
=> Hôm qua John đã đến cửa hàng trước khi về nhà.
2/ Our teacher (tell) told us yesterday that he (visit) has visited England in 1970.
=>Giáo viên của chúng tôi đã nói với chúng tôi ngày hôm qua rằng ông đã đến thăm nước Anh vào năm 1970.
3/ When John and I got to the theatre, the movie (start)had already started.
=> Khi John và tôi đến rạp, bộ phim đã bắt đầu.
4/ Before Alice (go) went to sleep, she (call) had called her family.
=> Trước khi Alice đi ngủ, cô đã gọi cho gia đình.
5/ When the phone (ring) rang, I (have) was having dinner.
=> Khi điện thoại reo, tôi đang ăn tối.
6/ Daisy (agree) agreed with other members in the last meeting.
=> Daisy đã đồng ý với các thành viên khác trong cuộc họp cuối cùng.
7/ What were you (do) doing at 6 p.m yesterday?
=>Bạn đã làm gì lúc 6 giờ chiều ngày hôm qua?
8/ The little girl asked what (happen) has happaned to her ice-cream.
=>Cô bé hỏi chuyện gì đã xảy ra với cây kem của mình.
9/ He (teach) had taught in this school before he (leave) left for England.
=>Ông đã dạy trong trường này trước khi ông rời Anh.
10/ She (win) won the gold medal in 1986.
=> Cô đã giành huy chương vàng vào năm 1986.
VIII, TLĐ-IHITÐ
1. We'll go out when the rain (stop) stops
2. I (stay) will stay here until he (answer) answers me.
3. Wait until 1 (catch) catch you.
4. She (not come) won't come until you (be) are ready.
5. Miss Helen (help) will help you as soon as she (finish) finish that letter tomorrow.       

6. After the class (be) is over, ask the teacher about that sentence.          
7. I (come) will come and (see) see  you before I leave here.                      

8. We (go) will go home as soon as we have finished our work.                  
9. I (wait) will wait.  here until you (come)  come .back tomorrow.                  

10. I (send) will send  you some postcards as soon as I (arrive) arrive in London.  
IX.
1. I'll wait until he (finish) finishes his novel.
2. When you (came) come  back, he has already (buy) bought a new house.
3. Don't come until I (finish) have finished lunch.
4. I (hope) hope it (stop) will have stopped raining by 5 o'clock this afternoon.
5. The river (not begin) will not begin to swell until some rain (fall) falls .
6. By next month I (leave) will have left for India,
7. The film (end) ended by the time we (get) gotten there.
8. They (build)will have built a house by June next year.
9. We (start) will start our plan next week.
10. I (give) will give her your letter when I (see) see her tomorrow.

cho em câu trả lời hay nhất nha