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1. Were => had been
2. Had done => have done
3. Has => had
4. Will study => study
5. Am = >were
6. Will=> would
7. To => X
8. Unless => If
9. Apply => have applied
10. Will=> would
Tìm lỗi sai và sửa:
1. George now wishes he hasn't broken his engagement with Marian.
Hasn't ➜ Hadn't
2. I would do it if I could, but I can't so I wouldn't even try.
Wouldn't ➜ won't
3. He wouldn't have able to pass the test if his English hadn't been good enough.
Have able ➜ have been able
4. If only we knew all this information about the market many weeks ago.
➞ Đúng
5. My father gave me a watch for my birthday, but I wish he has given me a laptop instead.
Has given ➜ had given
Đây là ý kiến riêng mình nha
Có rì sai bạn bảo nhóe 
Mến VũNguyễn Công TỉnhXuân DinhQuỳnh NhiChippy Linh..... và mấy bạn khác giúp tớ với
Chia động từ trong ngoặc cho đúng.
1. If I .....were.... you, I would do differently ( be)
2. He will learn better if he ...does...his homework everyday. ( do)
3. If we ...had reviewed....the lessons carefully, we would have done the test well ( review)
4. She......would buy.....a new car if she had eough money. ( buy)
5. Please send him the letter if you.....learn...him(learn)
6. If I had learnt harder, I ......would have learnt..better( learn)
7. If we keep on littering, our environment....will be.seruously polluted ( be)
8. The vegetables will be poisonous and inedible if we.....use....much pesticide ( use)
9. If she .....drinks.....milk everyday, she will become stronger ( drink)
10. If they stayed at home, they wouldn't know what happened. ( stay)
11. We would help him if he....asked.....for help ( ask)
12. If today..were.Sunday, we would stay at home ( be)
13. If we plant more tress along the streets, we ..will have....more shade and fresh air ( have)
14. We will live happier and healthier life if we .......keep.....our environment clean ( keep)
15. If he.......gets..the new, he will let us know ( get)
rewrite the sentences with the words given.
1.Iam a faster worker than Tom is.
Tom.................doesn't work as fast as i do......................
2.Lan's English is more fluent than my sister's.(fluently)
My sister speaks English more fluently than Lan does..........................
3.A snail is slower than a crab.(slowly)
A snail moves...............slowlier than a crab.....................
4.Phong is a faster swimmer than Phuc.(fast)
Phong swims...........faster than Phuc does................
5.It's a pity my brother doesn't pass the driving test.
I wish.............my brother passes the driving tesr....................
6.Nam is better at English than Linh.
Linh..............isn't as better at English as Nam is..................
7.These pupils were very lazy.They couldn't complete their test successfully.
These pupils.............weren't hard..........enough............to complete their test...................
8.Did Mary buy this beautiful dress?
....................Was this beautiful dress bought by Mary?..........................
9.I won't hang these old pictures in the living room.
.......................The old pictures won't be hung in the living room............................
10.The boys said:"We have to try our best to win the match"
...............The boys said they had to try their best to win the match.............................
11.Her classmate said"Ha is the most intelligent girl in our class"
..............Her classmate said Ha was the most intelligent girl in their class...................
12.The car is uncomfortable,so I don't buy it.
If.................the car were comfortable, I would buy it.....................
13.They can't travel across this desert.
They wish..................they could travel across the desert.................
14."Please repeat what you have said,Mr Binh"Tim said
..........Tim asked Mr Binh to repeat what he had said.........
Sửa lỗi sai:
1. If we will reduce (A) the speed of population growth (B), there will be less (C)pressure on (D) the earth.
(A) ➜ reduce
2. Unless (A) we leave a bowl of (B) water under (C) the sun, it will (D) evaporate.
(D) ➜ won't
3. If (A) we continue to use (B) fuel at the current rate, we would (C) soon have to face (D) a fuel crisis.
(C) ➜ will
IX. Mỗi câu sau có một lỗi sai, gạch chân và sửa các lỗi sai đấy .
1. Ba and Song plays=> are playing football every afternoon with Khai and me
2. We buy=> bought two new rackets yesterday. We are going to play tennis this afternoon
3. I’m not going to do the homework for you . you should do it itself=> yourself
4. Our neighbors invited my friend and I=> me to dinner with them
5. You should try your best learning=> to learn hard to pass the exam
6. Bob lived=> have lived in Rome for three years and he doesn’t want to move to other city
7. They write the meaning of new words by=> with their mother tongue.
8 . How many countries will participate on=> in the Olympic Games?
9. This job is a lot different with=> from what I’m used to .
10. Not only the bathroom was flooded, and=> but also the rest of the house
Tìm lỗi sai và sửa lại:
1, My brother stopped to smoke because it was harmful for his health.( to smoke , because , harmful , for) -> to
2, We can save nature resourcers by using solor energy.( save , nature resourcers , by using , solor energy ) -> natural resources
3, You have browsed the internet since an hour and a quarter stop and take a rest.( have browsed , since , a quarter , a rest) -> for
4, I used to going on foot to school when i was a primary students.( going , on foot , when , primary) -> go
5, I am proud with being a part of the team. Hope that our team will a drive excellent result.( with , part of , hope , result ) -> of
have done => had done
Câu giả định trong quá khứ dùng với thì quá khứ hoàn thành em nhé!