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Oke ạ. Sửa:
7.By the time I had finished all my work, Ben arrived.
8.By the time I had gone to the supermarket, I prepared dinner for my family.
À vâng.
7. By the time I finished all my work, Ben had arrived.
8. By the time I went to the supermarket, I had prepared dinner for my family.

5. I didn't have breakfast before I left the house this morning.
-> When I Ieft the house, I didn't have breakfast.
6. I finished all my work. Then Ben arrived.
-> After I finished all my homework, Ben arrived.
7. I finished all my work. Then Ben arrived.
-> By the time I finished my homework, Ben arrived.
8. I prepared dinner for my family after I went to the supermarket.
-> By the time I went to the supermarket, I have done preparing dinner for my family.
9. Mr. Brown studied abroad for four years then he returned home as an excellent engineer.
-> Before Mr. Brown returned home as an excellent engineer, he studied abroad for four years.
10. My brother drank some orange juice. Then he felt a little bit better.
-> Before my brother felt a little bit better, he drank some orange juice.

I didn't have breakfast before I left the house this morning.
-> When I left the house this morning, I hadn't had breakfast.
I finished all my work. Then Ben arrived.
-> After I finished all my work, Ben arrived.
I finished all my work. Then Ben arrived.
-> By the time Ben arrived, I had finished all my work.
I prepared dinner for my family after I went to the supermarket.
-> By the time I went to the supermarket, I had prepared dinner for my family.
Mr. Brown studied abroad for four years then he returned home as an excellent engineer.
-> Before Mr. Brown returned home as an excellent engineer, he studied abroad for four years.
My brother drank some orange juice. Then he felt a little bit better.
-> Before my brother felt a little bit better, he drank some orange juice.
5 When I left the house this morning, I didn't have breakfast
6 After I had finished all my work,Ben arrived
7 By the time I finished all my work,Ben had arrived
8 By the time I went to the supermarket, I had prepared dinner for my family.
9 Before Mr. Brown returned home as an excellent engineer, he had studied abroad for four years
10 Before my brother felt a little bit better, he had drank some orange juice
By the time , Before QKĐ , QKHT
After QKHT , QKĐ
When QKĐ , QKĐ

1. Jack left the office before i arrived
-> When I arived the office, Jack had left
2.During lunch, someone rang the bell
-> While i was having lunch, someone rang the bell.
3. I haven't been to the dentist for 6 months
-> The last time I went to the dentist was 6 months ago.
4. She has studied Japanese for 5 years
-> She began studying Japanese for 5 years.
5. She did all his work and then went to home
-> After doing all his work, he went to home.
6. Steven bought a new motorbike, but first he saved enough money
-> Before buying a new motorbike, Steven saved enough money.
7. The guests left and then we tidied the house
-> When we tidied the house, the guests had left.
8. I haven't heard fro them for ages
-> It 's ages since I last heard from them.

1.Tom hasn't had his hair cut for five months => The last time Tom had his hair cut was five months ago.
2.after walking for three hours we reached the stop of the hill => After we had walked for three hours we reached the top.
3.i and Dave tried to ring each other at the same time => While ringing to each other, Dave and I tried to do at the same time.
4.during his test at school mobile phone rang => When doing his test at school the moblie phone rang.
5. Mary made a sandwich and then sat on sofa to wacth tv=> Before sitiing on the sofa to watch T.V, Mary made a sandwich.
6.Dave did his homework and then went to bed=> After having done his homework, Dave went to bed.
7.as soon as he approached the house the policement stopped him => No sooner had he approached the house when the policeman stopped him.
8.she hadly begun to speak before people started interrupting her=> Hardly had she begun to speak when people started interrupting her
9.Mai hasn't gone to the cinema with her friends for one years => Mai last went to the cinema with her friends one year ago.
10.In the middle of their sleep the fire broke out => When they were sleeping, the fire broke out.

E1
1. Before I passed the exam, I had worked very hard for it
2. After I had considered what to study, I decided to major in maths
3. After she had written a letter, she went to bed
4. After he had checked the price, he bought a radio
5. After they had argued, they fought
6. Before she had a fatal accident, she had gone out for a walk
7. After she had faced the matter, she decided to go away
8. Before we wrote the assignment, we had read the book
9. After she had watched the film, she wrote a report
Hành động xảy ra trước một hành động trong quá khứ -> S + HAD + V phân từ II
E2
1. Swimming every day is a good way of keeping fit.
2. Learning a foreign language takes a long time
3. Growing your own food is less expensive
4. Sitting in one place for so long is uncomfortable
5. Smoking is not allowed here
Chủ ngữ là một danh động từ (gerund) -> ĐỘNG TỪ Ở HIỆN TẠI CHIA SỐ ÍT
E1
1. Before I passed the exam, I had worked very hard for it
2. After I had considered what to study, I decided to major in maths
3. After she had written a letter, she went to bed
4. After he had checked the price, he bought a radio
5. After they had argued, they fought
6. Before she had a fatal accident, she had gone out for a walk
7. After she had faced the matter, she decided to go away
8. Before we wrote the assignment, we had read the book
9. After she had watched the film, she wrote a report
Hành động xảy ra trước một hành động trong quá khứ -> S + HAD + V phân từ II
E2
1. Swimming every day is a good way of keeping fit.
2. Learning a foreign language takes a long time
3. Growing your own food is less expensive
4. Sitting in one place for so long is uncomfortable
5. Smoking is not allowed here
Chủ ngữ là một danh động từ (gerund) -> ĐỘNG TỪ Ở HIỆN TẠI CHIA SỐ ÍT

TENSES:Supply the correct werb tenses
1.we seldom (eat)...eat.....before 6:30
2.my mother sometimes(buy).....buys........vegetable at this market
3.the earth(circle)...circles .......the sun once every 365 days
4.he had taught in this school before he(leave)......left.........england
5.the sun (set)....sets....in the west
6.rivers usually(flow)....flow.......to the sea
7.our teacher(tell).told......us yesterday that he(visit)..visited ....england in 1970
8.I expect I....had....(have) children in a few years
9.the teacher hopes we(pass)...will pass....our exams
10.she(be)....will be .....twenty years old on next birthday
11.water(boil)...boils...at 100 degrees celsius
12.lan(study)......studied ..........four lessons this morning
13.thao is very clever she(speak)...speaks.....four languages
14.last year Mr.jones(teach)....taught ..........us both english and mathematics15."where do you live?""normally I....live.......in paris with my parents but at the moment I....am studying .....in london so I....am living ...with an english family (live,study,live)
16. he usually.....works....very hard but he ..isn't working .....at all today because it's a holiday (work,not work)
17.look! that man.....is running .........out of the bank! and he..is carrying ......a large bag full of money! (run,carry)
18.I(study)...have studied ......english for three years
19.up to the present we(write)...are writing .......almost every lesson in the look
20.I(not see)..haven't seen.....him since last monday
21.geogre(work)....has worked ...at the university so far
22.my father(not smoke)...hasn't smoked......for 5 years
23.Have you(receive)....received ......any letter from your parents yet?
24.jim sends his love I(just,see)....have just seen ....him in the high street
25.monica says she(alrealy,catch)...has alrealy caught ...the train so she'll be here in half an hour
26.while diana(watch).....is watching .....her favourite TV progamme,there(be)....is ......a power cut
27.who(drive)...was driving .the car at the time of the accident?
28.by the time sheila(get)..is getting ....back, chris(go).......is going ....home
29.I(do)....did ......some shopping yesterday when I(see)...saw ...your friend
30.what were you (do)....doing .......when I(come)......came .....to your office yesterday?
31.who(live)....has lived ...in that house before the smiths(buy)...bought ...it
32.when the police(arrive)......arrived ......the robbers had gone
33.when I arrived the students(already,go)......have already gone ...in to class
34.miss davis(type).........typed ........letters after manager(come)...came .....back
35.my roommate had finished dinner by the time I(get)...was getting .....home
36.they(go).......went .......home after they(finish)....finished ..their work
37.after they(go).....went ......I(sit)....sat ..down and (rest)....rested ....
38.before she(watch)..has watched ...TV she(do)..did ......her homework
39.when she....was .(be)a child she always.......wanted .....(want) to do the most dangerous things
40.I suddenly.........recognized .......(recognize) the town square I....have been .......(be) there ten year before

II. Supply an appropriate from for each verb in brackets:
1, I don't enjoy (laugh) being laughed at By other people.
2, I'm angry at him for (not/ tell) not telling me the truth.
3, It is easy (fool) to fool by his lies.
4, He expected (invite) to be invited to the family gathering party, but he wasn't.
5, Sometimes teenagers complain about (not/understand) not standing by their parents.
6, The parking attendant didn't allow the woman (park) to park for Free.
7, Nancy had a narrow escape. She was almost hít by a cắt. She barely avoided (hit) being hit by a speeding automobile.
8, Mr.Thopson is alway willing to help if there is a problem in the office, but he doesn't want (call) to be called at home unless there is an emergency.
9, Jack has a good chance of (elect) being elected I know I'm going to vote for him.
10, You must tell me the truth. I insist on (tell) being told the truth.
11, We don't mind (get) gettitng up earlier than usual for World.
12, I'd like (go) to go sailing this summer.
13, Your compositions are supposed (write) to be written in ink.
14, Mary regrets (be) being The One to have to tell him.
15, Would you mind (show) showing me how (word) to word The list?
16, You can't see tom now because (he/have) he is having a bath.
17, Mary usually (learn) learns language very quickly but she (not/ seem) doesn't seem to be able to learn modern Greek.
18, By the time Sheila (get) got Black, Chris had gone home.
19, Tommy admitted (throw) throwing The rock through the windows.
20, There are too many people here for me (talk) to talk to all of them.
21, We usually (get) get up at about 7.00.
22, He (do) was doing homework at this time yesterday.
23, By the time he (retire) retired,he (appear) had appeared in some movies.
24, It was quite a surprise (see) to see him again.
25, They let their children (stay) stay up late to watch TV.

Give the correct tense of the verbs
1. Jane (not be) wasn't at home yesterday evening
2. George (not, complete) hasn't completed the assignment yet
3. How long ago (he start) did he start to learn French ?
4. My father usually (drink) drinks beer after meals but now he (drink) is drinking tea
5. After he (be) had been ill for a long time, he (die) died last year
6. My children (watch) were watching TV when I (come)came back from work7. I (see) saw a bad accident while I (wait) was waiting for you on this corner
8. As soon as he (get) gets a certificate in English, he will apply for a job
9. When I looked round the door, the baby (sleep) was sleeping quietly
10. She is very absent-minded: she (lose)has lost her cell phone three times
11. I was sure that I (meet) had met him before
12. Nothing (change) has been changed in this town since I first visited it
13. While they (dance) were dancing in the hall, the light (go) went out
14. This is the first time I (be) have been to this country
15. Today is Thursday and she (be) is late twice this week. She (be) was late yesterday and on Monday
16. Last month my brother (send) sent me his photos. He (send) sends me his photos every year
17. What (you, do) have you done since you left school ?
18. Sometimes I get up before the sun (rise)rises
19. After Jessica (finish)finishes her degree, she intends to work in her father's company
20. By the time the police arrived, the house (be)had been burned down
21. I won't leave until she (come) comes back
22. They (begin) began to study at this school 7 years ago
23. Listen ! Someone (knock)is knocking the door
24. He often (listen) listens to classical music whenever he (have) has free time
25. They (not go)didn't go to the library last Sunday
26. Tom (not, speak) hasn't spoken to me since he (arrive)arrived
27. So far this week there (be)has been three burglaries in our street
28. Susan (send)sent a letter to her university last month after she (receive)had received her scholarship check
29. Be quiet ! My parent (work) are working in the room
30. My mother (be)has been in hospital for a long time and she cannot go home yet
31. Tim (play) was playing chess when I (come) came to visit him yesterday
32. Have You (see) seen Robert lately ?
33. When I was a child, I (play) played the violin
34. John will buy that book as soon as he (receive) receives his money next week
35. Linh's brother (lose) lost his job last month and since then he (be)has been out of work
36. As soon as she (save)saves one hundred million dongs, she will retire from work
37. When she was a little girl, every weekend (seem)seemed ideal
38. How many times have you (be) been to Ho Chi Minh City ?
5. When I left the house this morning, I hadn't had breakfast.
6. After I finished all my work, Ben arrived.
7. By the time I finished all my work, Ben arrived.
8. By the time I went to the supermarket, I prepared dinner for my family.
9. Before studying abroad for four years, Mr. Brown returned home as an excellent engineer.
10. Before drinking some orange juice, my brother felt a little bit better.Làm sai hết r