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I. Combine two sentences, using ''because/ since/ as''.
1. The water is highly polluted. We cannot swim in this part of the river. ->..........because ( since / as ) .the water is highly polluted, we cannot swim in this part of the river......
2. The company does not produce recycled paper. It is more expensive to produce than regular paper. ->..............The company does not produce recycled paper because it is more expensive to produce than regular paper. .........
3. We want people to be aware of the problem of pollution. We have'' a green week'' three times a year. ->.......because we want people to be aware of the problem of pollution, We have'' a green week'' three times a year. ..................
4 The area around the beach is full of trash. No one wants to go swimming or sunbathing there. ->...........since the area around the beach is full of trash, No one wants to go swimming or sunbathing there. ....................
5. It started to rain. We could not keep on cleaning the beach. ->........as it started to rain, we could not keep on cleaning the beach. -..........................
6.Mr. Minh is admired. He dedicated all his life protecting environment. ->........................Mr. Minh is admired because He dedicated all his life protecting environment...........
II. Rewrite each sentences so that the meaning stays the same:
1. Shall I phone you this evening? -> Do you want.............me to phone you this evening ?..........................
2. I can do what I want and you can't stop me. -> You can't..........prevent me from doing what i want...................
3 I would like you to help me to put the chairs away. -> Do you mind.........helping me put the chairs away ?...................
4. It's not a good idea to travel during the rush hour. -> It's better to avoid.................travelling during rush hour.....................
5. I'd refer not to go out tonight. -> I'd rather.........not go out tonight..............................
. Using the words given and other words, complete the second sentence so that it has a similar meaning to the first sentence. Do not change the word given (Use 2 – 5 words in total)
E. g: Whose bag is this? (belong)
=> Who does this bag belong to?
1. I am sorry I can’t speak English fluently. (wish)
=> I _____WISH I COULD SPEAK_________________________________ English fluently.
2. Walking among the green trees gave Liz pleasure. (enjoyed)
=> Liz __________ENJOYED WALKING AMONG THE ____________________________ green trees.
3. Peter is fourteen years old. Van is fourteen years old. (age)
=> Peter _____________IS THE SAME AGE AS _________________________ Van.
4. Mai began singing when she was eleven. (able)
=> Mai has __________BEEN ABLE TO SING SINCE ____________________________ she was eleven.
5. It’s a pity the weather isn’t better today. (only)
=> If ____________ONLY IT WERE __________________________ better today.
6. That house was built three decades ago. (built)
=> People _____________BUILT THAT HOUSE THREE______________________ decades ago.
7. It is the first time I have seen such a good movie. (before)
=> Never ______BEFORE HAVE I SEEN SUCH_____________________________a good movie.
8. I spent all evening doing those exercises last night. (took)
=> It ______________TOOK ME ALL EVENING TO _____________________do those exercises last night.
9. We couldn’t drive our car because of the heavy snow.(prevented)
=> The heavy snow ___________PREVENTED US FROM DRIVING CAR______________________our car.
10. My parents made me study hard late at night. (to study)
=> I ____________WAS MADE TO STUDY _______________________ late at night by my parents.
Complete the second sentence with the same meaning.
1. He said: We must have a party to celebrate this -> He said that ....THEY HAD TO HAVE A PARTY TO CELEBRATE THAT................
2. I'm on the tenth page of the letter I'm writing -> So far I ...............HAVE WRITTEN TEN PAGES OF THE LETTER...........
3. Minh last wrote to his pen pal five months ago. -> Minh hasn’t .....WRITTEN TO HIS PEN PAL FOR FIVE MONTHS.............
4. They usually wore jeans when they were young. -> They used.......TO WEAR JEANS WHEN THEY WERE YOUNG.........
5. We couldn’t go to school this morning because of the heavy rain. -> Because ...IT WAS RAINING HEAVILY,We couldn’t go to school this morning ............
6. Practice speaking everyday or you can't improve your English. -> If .....YOU DON'T Practice speaking everyday , you can't improve your English .....
7. Hard work is the secret of passing your exam. -> So long as.......YOU WORK HARD,YOU WILL PASS YOUR EXAM......................
8. You donot have to pay for elementary education in Viet Nam. -> Elementary education ..DOESN'T HAVE TO BE PAID FOR IN VN........
9. He was a fool to say that -> It is.......FOOLISH FOR HIM TO SAY THAT..................................
10. Living in the city is exciting -> Some people find IT IS EXCITED TO LIVE IN THE CITY
Câu điều kiện đặc biệt (tiếp)
Bài 1:
1. I didn't know his address in LonDon, so i didn't visit him (VISITED )
-> If i had know HIS ADDRESS IN LONDON , I WOULD HAVE VISITED HIM.
2. If you don't speak clearly, the audience won't understand you (ELSE)
-> You have to SPEAK SLOWLY OR ELSE THE AUDIENCE WON'T UNDERSTAND YOU.
3. Angela, you're not old enough overwise you would be able to get a motorbike ( WERE)
-> Angela, I WISH YOU WERE OLD ENOUGH TO GET A MOTORBIKE.
4. I wouldn't mind being transferred to another city if they offered me a higher salary (CONDITION)
-> I wouldn't mind HAVING CONDITION TO ANOTHER CITY IF THEY OFFERED ME A HIGHER SALARY.
5. If he decides to go shopping, there's a chance that i will go with him (MIGHT)
-> If he DECIDED TO GO SHOPPING, HE MIGHT GO WITH ME.
6. We can have dinner here unless you want to go a restaurant (WANT)
-> If YOU DON'T WANT TO GO A RESTAURANT, WE CAN HAVE dinner here
7. Fortunately, they were wearing seat belts, so nobody was seriously ịnjured ( NOT)
-> If THEY HADN'T BEEN WEARING SEAT BELTS, SOMEBODY WOULD HAVE been seriously injured
8. I'd like to travel all over the world but i don't have enough money( WOULD)
-> I WOULD TRAVEL all over the world ì i had enough money
Bài 2:
1. If they ofered you the job, would you accept? ( WERE)
-> Were they to be offered the job, would you accept?
2. If you are in London by any chance, come and see me.( SHOULD)
-> Should you happen to be in London, come and see me!
3. If you do have any free time, could you give me a ring? ( HAPPEN)
-> Should you not have any free time , could you give me a ring?
4.Without you, I would have given up years ago ( BEEN)
-> If it hadn't been for you, I would have given up years ago.
5. If Pauline hadn't been interested, the project would have been abandoned (BUT FOR)
->But for Pauline's interested, the project would have been abandoned
6. What would you do if you found some buried treasure? (WERE)
-> If you were to find some buried treasure, What would you do ?
7. Dịck is in prison now because a detective recognized him (IF)
->If a detective had not recognized him, Dick would not in prison
8. The fire was brought under control hanks to the night-watchman (IT HADN'T)
-> If it had not been for the night watchman, the fire would be out of control.
Tự vẽ hình nha.
c. Ta có: \(\left\{{}\begin{matrix}\widehat{BFA}=\widehat{FIA}+\widehat{IAF}\\\widehat{FAB}=\widehat{MAB}+\widehat{FAM}\end{matrix}\right.\)
Mà \(\widehat{FIA}=\widehat{MAB}\) (Cùng phụ \(\widehat{ABI}\) )
Và \(\widehat{IAF}=\widehat{FAM}\) (gt)
\(\Rightarrow\widehat{BFA}=\widehat{FAB}\) Hay \(\Delta ABF\) cân tại B.
Mà \(BE\perp AF\) ( \(\widehat{AEB}=90^0\) )
Nên \(AE=EF\) (1)
Ta lại có: \(\left\{{}\begin{matrix}HK\perp AE\\\widehat{HAE}=\widehat{KAE}\end{matrix}\right.\) Suy ra \(\Delta AHK\) là tg cân.
\(\Rightarrow HE=EK\) (2)
Từ (1)(2)suy ra \(AHFK\) là hình bình hành.
\(\Rightarrow FK//IA\)
Hay \(AIFK\:\) là hình thang. Để AIFK nội tiếp được đường tròn thì \(\widehat{BIA}=\widehat{IAM}\) \(\Rightarrow\widehat{BIA}=\widehat{ABI}\) \(\Rightarrow\widehat{MBA}=\widehat{MAB}=45^0\)
Hay M là điểm chính giữa cung AB./.
Có gì không hiểu cứ hỏi mình nha. !
Exercise 4 :
2, When I slow, I will late for the flight.
Change into passive
1. They will hold the meeting before May Day.
------->The meeting ......will be held before May Day......
2. Somebody has taken some of my books away
--------> Some of my books have been taken by somebody............
3. They have to repair the engine of the car.
-------> The engine of the car ....HAS TO BE REPAIRED.......
4. They may use this room for the classroom.
---------->This room .......MAY BE USED FOR THE CLASSROOM........
5. The teacher is going to tell a story.
------------A story IS GOING TO BE TOLD BY THE TEACHER...........
6. John used to visit his parents at weekends.
----------> His parents ....USED TO BE VISITED BY JOHN AT WEEKENDS.........
7. They use milk for making butter and cheese.
-------->Milk clothing. ..IS USED FOR MAKING BUTTER AND CHEESE..........
8. They have provided the victims with food and clothing
-----> The victims ......HAVE BEEN PROVIDED WITH FOOD AND CLOTHING......
9 . People speak English in most every corner of the world .
------>. English ...IS SPOKEN IN MOST EVERY CORNER OF THE WORLD.........
10. The students are writing the lesons now .
------> The lesson IS BEING WRITTEN BY THE STUDENTS NOW.
11. Her teacher taught her how to apply this theory
------>She .WAS TAUGHT HOW TO APPLY THIS THEORY BY HER TEACHER.............
12. Someone will tell him that news.
------> he ......WILL BE TOLD THAT NEWS BY SOMEONE....
EXERCISE: Complete the sentences with "for" or "since":
1. We haven't heard from them ___FOR______ ages
2. They waited for you _____FOR____ two days
3. They haven't met him ____SINCE_____ he left the room
4. We have bought the new car ___SINCE_____ 1999
5. Haven't you seen him _____SINCE_______ Christmas?
6. It was not rained ____SINCE______ May
7. I haven't written to him _______FOR_ five months.
8. She has spoken to them _____SINCE__ this morning
9. We have listened to music __SINCE______ 8a.m
10. The house been built _____SINCE_____ last year
EXERCISE: Use simple past or present perfect to complete the following sentences:
1. Her English ( improve) ______HAS IMPROVED_____ recently
2. How many pages _____HAVE YOU READ____ you (read) _________ so far?
3. We (finish)____FINISHED____ our homework two hour ago
4. __________ you(be)__________ to Rome? HAVE YOU BEEN
5. I (see)____________ him several times on TV HAVE SEEN
6. What _______you (do)__________ last night? DID YOU DO
7. This is the first time I (visit)______ the city HAVE VISITED
8. They (buy)__________ the garden some days ago. BOUGHT
9. I (learn)________ English since I (be)__________ 11 years old HAVE LEARNT/ WAS
10. Be careful! I (just clean)________ the floor HAVE JUST CLEANED
11. The meal (already be)___HAS ALREADY BEEN____ ready
12. I ( never read)________ an interesting story like this before HAVE NEVER READ
EXERCISE : Rewrite the following sentences with the words given
l. Minh last wrote to his pen al five months ago
-> Minh hasn't WRITTEN TO HIS PENPAL FOR 5 MONTHS.
2. The last time we visited Kuala Lumpur was 3 years ago
-> I haven't VISITED KUALA LUMPUR FOR 3 YEARS.
3. When did you study English?
-> How long HAVE YOU STUDIED ENGLISH ?
4. They began building this house 2 months ago
->They have BUILT THIS HOUSE FOR 2 MONTHS.
5. My father started to work in this factory last week
-> My father has WORKED IN THIS FACTORY SINCE LAST WEEK.
6. How long has he worked in the garden?
->When DID HE BEGIN TO WORK IN THE GARDEN ?
7. How long ago did you learn music?
-> How long have YOU LEARNT MUSIC ?
8. He started living in Ho Chi Minh city when he was 8
-> He has LIVED IN HCM CITY SINCE HE WAS 8.
9. He learnt English when he was 18
-> He has..LEARNT ENGLISH SINCE HE WAS 18.
10. They have worked in that factory for five years
-> They began WORKING IN THAT FACTORY 5 YEARS AGO.
ll. My father stopped smoking two years ago
-> My father hasn't SMOKED FOR 2 YEARS.
12. We have learnt English for four years.
-> We started. LEARNING ENGLISH 4 YEARS AGO.
13 My father started to give up smoking last year
-> My father has GIVEN UP SMOKING SINCE LAST YEAR.
14. They have worked in that factory since 2001
-> They started. WORKING IN THAT FACTORY IN 2001.
15. Lan hasn't written to Maryam for a month.
-> Lan didn't...WRITE TO MARYAM A MONTH AGO...
16. He has lived in Ha Noi since he was 12.
-> He started. LIVING IN HA NOI WHEN HE WAS 12.
17. I haven't met her for a long time.
-> I didn't. MEET HER A LONG TIME AGO.
18. How long have you leamt French ?
-> How long ago DID YOU LEARN FRENCH ?
19. How long have you bought this car -> When did YOU BUY THIS CAR ?
20. When did you start to listen to classical music ?
->How long HAVE YOU LISTENED TO CLASSICAL MUSIC ?
21. I saw her 10 years ago.
-> I haven't SEEN HER FOR 10 YEARS.
EXERCISE : Rewrite the following sentences with the words given
l. Minh last wrote to his pen al five months ago
-> Minh hasn't written to his pen pal for five months
2. The last time we visited Kuala Lumpur was 3 years ago
-> I haven't visited Kuala Lumpur for 3 years
3. When did you study English?
-> How long have you studied English
4. They began building this house 2 months ago
->They have built this house for 2 months
5. My father started to work in this factory last week
-> My father has worked in this factory since last week
6. How long has he worked in the garden?
->When did he work in the garden?
7. How long ago did you learn music?
-> How long have you learnt music ?
8. He started living in Ho Chi Minh city when he was 8
-> He has lived in Ho Chi Minh City since he was 8
9. He learnt English when he was 18
-> He has...learnt English since he was 18
10. They have worked in that factory for five years
-> They began to smoke in that factory five years ago
ll. My father stopped smoking two years ago
-> My father hasn't smoked for two years
12. We have learnt English for four years.
-> We started. to learn English four years ago
13 My father started to give up smoking last year
-> My father has given up smoking since last year
14. They have worked in that factory since 2001
-> They started. to work in that factory in 2001
15. Lan hasn't written to Maryam for a month.
-> Lan didn't...write to Maryam a month ago..
16. He has lived in Ha Noi since he was 12.
-> He started.to live in Ha Noi when he was 12
17. I haven't met her for a long time.
-> I didn't. meet her a long time ago
18. How long have you leamt French ?
-> How long ago did you learn French?
19. How long have you bought this car -> When did you buy this car?
20. When did you start to listen to classical music ?
->How long have you listened to classical music?
21. I saw her 10 years ago.
-> I haven't seen her for 10 years
1, We last met our neighbors 6 years ago.
-> We have not met our neighbors for 6 years.
2, Lan did not write to her parents a month ago.
-> Lan has not written to her her parents for a month.
3, When did you start to listen to classical music?
-> How long have you listened to classical music?
4, He started to live in Hanoi when he was 12.
-> He has lived in Hanoi since he was 12.
5, He often made a birthday cake for me.
-> He used to make a birthday cake for me.
6, It's a pity he can not come to the party.
-> I wish he could come to the party.
7, They learn English all over the world.
-> English is learnt all over the world.
8, You must do this work right away.
-> This work right away must be done (by you)
9, Lan is interested in listening to pop music.
-> Lan enjoys listening to pop music.
10, " I am having a wonderful time here " said Nga.
-> Nga said she was having a wonderful time there.
11, " Why don't you go with me now ?"
-> She asked me why I didn't go with her then.
1, We last met our neighbors 6 years ago.
-> We have not met our neighbors since last 6 years ago.
2, Lan did not write to her parents a month ago.
-> Lan has not written to her parents last a month.
3, When did you start to listen to classical music?
-> How long have you listened to classical ?
4, He started to live in Hanoi when he was 12.
-> He has lived in Hanoi since he was 12.
5, He often made a birthday cake for me.
-> He used to make a birthday cake for me.
6, It's a pity he can not come to the party.
-> I wish he could come to the party.
7, They learn English all over the world.
-> English is learnt all over the world.
8, You must do this work right away.
-> This work right away must be done by you.
9, Lan is interested in listening to pop music.
-> Lan enjoys listening to pop music.
= Lan enjoys pop music.
10, " I am having a wonderful time here " said Nga.
-> Nga said that she was having a woderful time there.
11, " Why don't you go with me now ?"
-> She asked me why I didn't go with her then.
Viết lại câu sao cho nghĩa không đổi:
1. my grandfather bought this clock last year.
-> This clock was bought by my grandfather last year.
2. She started learning English 10 years ago.
-> She has learnt English for 10 years.
3. People have used the Internet all over the world.
-> The Internet was used all over the world.
4. I often go to bed late.
-> I am used to going to bed late.
5. She must finish this work right now.
-> She wishes she finished that work right then.
6. They said to him " We are going there now."
-> They told him to go there then.
7. I asked Mary " When will you learn to play the piano ?"
-> I asked Mary when she would learn to play the piano.
8. " We must finish our homework tonight", the girls said.
-> The girls said (that) they must finish their work that night.
9. " Do you like English, Nam?" asked Mai.
-> Mai asked Nam if he liked English.
10. I was very delighted that I passed the final exams.
-> I was very delighted to pass my final exam.
11. Susan received a lot of birthday presents. She was happy.
-> She was happy to receive a lot of birthday presents.
12. It was confident of her to say that she would win the first prize.
-> She was confident to say that she would win the first prize.
Sai bn bỏ qua nhá 
1.The last time she saw him was him 3 months ago
=> It's 3 months since she last saw him
2.I last saw them 5 years ago
=>I have not seen them for 5 years
=>It's 5 years since I last saw them
3.They started working there 10 years ago
=>They have worked there for 10 years
4.She last read this letter 3 months ago
=>She has read this letter for 3 months
=>It's 3 months since she last read this letter
5.It's a long time since I last skipped rope
=>I have not skipped rope for a long time
6.He hasn't eaten dog meat before
=>This is the first time he has eaten gog meat
7.This is the most luxuruous hotel my family has ever lived
=>My family has never lived in such a luxurios hotel like this before
8.It is the most expensive car he has ever bought
=>He has never bought such an expensive car like that before
9.That is the worst restaurant we have ever eaten in
=>We have not eaten in such a bad restaurant like that before
1.People speak English all over the world
⇒English is spoken all over the world
2.It started to rain 30 minutes ago
⇒It has rained for 30 minutes
3.Do u have a better racket than this?
=> Is this the best racket you have?
5. Would u mind if I used your phone?
=> Would u mind lending me your phone?
6.We should plant more trees to get fresh air
=>We'd better plant more trees to get fresh air
7.He put some gold rings in the bag (đặt câu hỏi)
=> Where did he put some gold rings?
8. No. He has never attended The Hung King Temple Festival (đặt câu hỏi)
=> Has he ever attended The Hung King Temple Festival?
1.English is spoken all over the world
2.It has rained for 30 minutes
3.Is this the best racket you have?
5.Would you mind lending me your phone?
6.We'd better plant more trees to get fresh air
7.Where did he put some gold rings?
8.Have he attended the Hung King temple festival?