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1) It is late now; I don't think Ann will come to see us
-> I would be surprised if Ann came to see us.
2)We don't go on holiday because we don't have enough money
-> If we had enough money, we would go on holiday.
3) Do these exercises more carefully or you will fail the exams
-> Unless you do these exercises more carefully, you will fail the exams.
4) I do not know the answer so I can not tell you
-> If I knew the answer, I could tell you.
5) She can't apply for the job because she doesn't know French
-> If she knew French, she could apply for the job.
6) if she didn't come here now, we'd come back home
-> Unless she came here now, we'd come back home.
7) Be careful or you will not be able to get the job
-> Unless you are careful, you will be able to get the job.
8) The trees will die unless it rains soon
-> If it doesn't rains soon, the trees will die.
Noise is constant and loud sound. To measure the loudness, or volume of sounds, people use a unit called a decibel. When a sound is louder than 70 decibels, it can cause noise pollution. Do you know that the noise from a vacuum cleaner or a motorcycle can result in permanent hearing loss after eight hours? The sounds of a concert are even more serious. They can reach as high as 130 decibels and may cause immediate and permanent hearing loss. Noise pollution can also lead to headaches and high blood pressure. If you are listening to music through headphones, and other people can hear it. it means the music is too loud and unsafe. If there seems to be a ringing or buzzing in your ears, it means the noise is affecting you and damaging your hearing- Wearing earplugs when you go to concerts or other loud events, and listening to music through headphones or headsets at safe levels can help you reduce the effects of noise pollution.
1. What do people use to measure the loundness or volume of sounds ?
They use a unit called a decibel to measure the loundness or volume of sounds
2. Does the noise from a vacuum cleaner result in pernament hearing loss after eight hours ?
Yes, it does
3. What can noise pollution also lead to ?
It can also lead to headaches and high blood pressure
4. Is the music safe when you listen to it through headphones , and other people can hear it as well ?
No, it isn't
5. What can you do to help reduce the effects of noise pollution ?
I can wear earplugs when you go to concerts or other loud events, and listening to music through headphones or headsets at safe levels to help reduce the effects of noise pollution
1. We didn't hurry, so we were late for the concert.
=> If we had hurried, we wouldn't have been late for the concert.
2. In order to get a driver's license, you must be at least 18 years old.
=> If you want to get a driving license, you must be at lest 18 ys old.
3. A person must have a passport to be able to travel abroad.
=> A person cannot travel abroad unless he/she has a passport.
4. Tom dosen't do anything if you don't tell him what to do.
=> Unless you tell Tom what to do, he doesn't do any thing.
5. We must take steps to preserve natural resources, or the planet will be in danger.
=> Unless we take steps to preserve natural resources, the planet will be in danger.
6. He doesn't get a job, so he can't pay his bills
- If He got a job, he could pay his bills
7. She isn't fit because she sits around too much
- If she didn't sit around too much, She would be fit
8. The fire brigade came immediately, so the house didn't burn down
- If The fire brigade hadn't come immediately, the house would have burned down
Rewrite:
1. We didn't hurry, so we were late for the concert
- If we had hurried, we wouldn't have been late for the concert.
2. In order to get a driver's license, you must be at least 18 years old
- If you want to get a driver's license, you must be at least 18 years old.
3. A person must have a passport to be able to travel abroad
- A person cannot travel abroad unless he/she has a passport.
4. Tom doesn't do anything if you don't tell him what to do
- Unless you tell Tom what to do, he won't do anything.
5. We must take steps to preserve natural resources or the planet will be in danger
- Unless we take steps to preserve natural resources; the planet will be in danger.
6. He doesn't get a job, so he can't pay his bills
- If he got a job, he could pay his bills.
7. She isn't fit because she sits around too much
- If she didn't sit around too much, she would be fit.
8. The fire brigade came immediately, so the house didn't burn down
- If the fire brigade hadn't come immediately, the house would have burned down.
1.If you didn't take exercise regularly, it wouldn't be the way to get fit.
2. If I had a dictionary, I could look the word up.
3.If I had his phone number, I would phone him.
4.If you didn't give me a ring, you might want a help.
5.If it wasn't raining, we would finish the game.
6.If thu bus weren't always so crowed, I would take it to school very morning.
7.If people realised how important it is to conserver energy, they wouldn't do nothing about it.
8.If David wasn't so clumsy, he wouldn't have a lot of accidents.
Ex1: Complete the conditional sentences, using the given information:
1. You should take exercise regularly because it is the way to get fit.
=> If you take exercise regularly, you will get fit.
2. I can't look the word up because I don't have a dictionary.
=> If I had a dictionary, I could look the word up.
3. I don't have his phone number, so I don't phone him.
=> If I had his phone number, I would phone him.
4. You may want a help, just give me a ring.
=> If you want a help, you must give me a ring.
5. It is raining, so we won't finish the game.
=> If it weren't raining, we would finish the game.
I. Put the verds in brackets into the correct forms:
1. If I (have) .have.... time, I will write to him.
2. If it's cold, I (need) .will need... a heavier coat
3. What are you going to do if you (have).have... a holiday?
4. If I meet Helen, I (give)..will give... her your messenger
5. If I can go tomorrow, I (let)...will let.. you know
6. If flowers don't get any water, they (die)..will die..
7. Don't come if they (not call)..don't call..you
8. If I didn't feel so tired, I (go)...would go. out with you.
9. I could repair the car if I (have).had... the right tools.
10. If she hadn't been ill yesterday, she (go).would have gone.... to work now.
II. Rewrite these sentences, beginning as shown, so that the meaning stays the same:
1. If you don't like this one, I'll bring you another.
=> Unless you like this one, I'll bring you another.
2. I'll only help you if you promise to try harder.
=> Unless you promise to try harder,. I won't help you
3. Unless you work hard, you will not fail the exam
=> If you don't work hard, you will not fail the exam
4. Stand up or you will be punished.
=> Unless you don't Stand up ,you will be punished.
5. Do your homework or you will get bad mark
=> If you don't Do your homework,you will get bad mark
III. Rewrite these sentences use "If"
1. I don't know enough about this machine, so I can't mend it myself.
=> If I knew enough about this machine, I could mend it myself.
2. I don't ride the bus to work every morning because it's always so crowed
=> If it weren't always so crowed, I would ride the bus to work every morning
3. The wwind is blowing hard, so I won't take the boat out for ride.
=> If The wwind wern't blowing hard, I would take the boat out for ride.
4. Nick can'r find the way because he doesn't have a map.
=> If Nick had a map,He could find the way
5. Susan felt sick because she ate many cream cake.
=> If susan hadn't eaten many crea, cake,she wouldn't have felt sick
6. Without this treatment, the patient would have died.
=> If it hadn't been for this treament, the patient would have died.
7. Those people weren't prepared to face the floods; therefore, the consequence was disastrous
=>If Those people had been prepared to face the floods; the consequence wouldn't have been disastrous
IV. Rewrite these sentences
1. The book was so expensive that I didn't buy it.
=> The book was too expensive for me to buy
2. He can touch the light because he's very tall
=> He is tall enough to touch the light
3. It is such good weather that they are going for picnic.
=> The weather is so good that they are going for picnic.
4. I didn't go and neither did my friend (either)
=> I didn't go and my friend didn't,either
Choose the best answer for each of the fllowing sentences
1. ............ if you work harder, you will be sacked.
A. Whether B. If C. However D. Unless
2. I think you should stop smoking.
A. If I am you, I will stop smoking B. If I were you, I will stop smoking
C. If I were you, I would stop smoking D. If I had been you, I would stop smoking
3. If you take the ice out of the fridge, it ...........
A. vaporizes B. melts C. heats D. disappears
4. We should do something to protect water from being polluted ........... we will have nothing to drink in the future.
A. if B. whether C. or D. unless
5. Let's knock on their door to see .......... home.
A. if they're B. unless they're C. whether they were D. if they were
6. Unless we .......... more snow, we can't go skiing.
A. will have B. have C. have had D. had
7. You'll fail the exam ........... you start revising.
A. if B. until C. when D. unless
8. Unless you wash the car, you .............. not drive it at the weekend
A. would B. could C. have to D. may
9. If Peter ............... his car before the drive, he ................ the problem of out of petrol.
A. cheked / will not get B. had checked / would not have got
C. checks / will not have got D. would be checking / will not have got
10. He stepped on the mine, and it exploded.
A. If he doesn't step on the mine, it doesn't explode.
B. If he doesn't step on the mine, it won't explode.
C. If he didn't step on the mine, it wouldn't explode.
D. If he hadn't step on the mine, it wouldn't have exploded.
bài 1: viết câu điều kiện
1. we can't get the ticked because i don't have the right change
If i had the right change ,we could get the ticked
2. study hard or you won't pass the exam
If you don't study hard, you won't pass the exam
3. don't be im patientor you will make mistakes
If you are im patientor ,you will make mistakes
4. there have been comflicts in that country since last year . people live unhapply
If there hadn't been comflicts in that country since last year, people would have lived happly
5. this factory doesn't treoct it's waste welllso there is a lot of water pollution
If this factory treocted it's waste well, there wouldn't be a lot of water pollution
6. if you don't tell me the truth , i cannot heip you
Unless you tell me the truth , i cannot heip you
7. unless she tells me the truth . i won't forgiro her
If she doesn't tell me the truth, i won't forgiro her
8. theywill get an gry if she doesn't come on time
Unless she come on time,theywill get an gry
1 If you (find) a skeleton in the cellar, don't mention it to anyone.
FIND
2 If you pass your examination, we (have) a celebration.
WILL HAVE
3 What (happen) if I press this button?
WILL HAPPEN
4 I should have voted for her if I (have) a vote then.
HAD HAD
5 If you go to Paris, where you (stay)?
WILL YOU STAY
6 If someone offered to buy you one of those rings, which you (choose)?
WOULD YOU CHOOSE
7 The flight may be cancelled if the fog (get) thick.
HAD GOT
8 If the milkman (come), tell him to leave two pints.
COMES
9 Someone (sit) on your glasses if you leave them there.
WILL SIT
10 You would play better bridge if you (not talk) so much.
DIDN'T TALK
11 What I (do) if I hear the burglar alarm?
WILL I DO
12 If you (read) the instructions carefully, you wouldn't have answered the wrong question.
HAD READ
13 I could repair the roof myself if I (have) a long ladder.
HAD
14 Unless they turn that radio off, I (go) mad.
WILL GO
15 If you were made redundant, what you (do)?
WOULD YOU DO
16 We'll have a long way to walk if we (run) out of petrol here.
RUN
17 If you shake that bottle of port, it (not be) fit to drink.
WON'T BE
18 I'll probably get lost unless he (come) with me.
COMES
19 You (not have) so many accidents if you drove more slowly.
WOULDN'T HAVE
20 If you (wear) a false beard, nobody would have recognized you.
HAD WORN
21 If she (leave) the fish there, the car will get it.
LEAVES
22 Unless they leave a lamp beside that hole in the road, somebody (fall) into it.
WILL FALL
23 You'll get pneumonia if you (not change) your wet clothes.
DON'T CHANGE
24 If I had known that you couldn't eat octopus, I (not buy) it.
WOULDN'T HAVE BOUGHT
25 If they (hang) that picture lower, people would be able to see it.
HUNG
26 She (be able) to walk faster if her shoes hadn't such high heels.
WOULD BE ABLE
27 I (bring) you some beer if I had known that you were thirsty.
WOULD HAVE BROUGHT
28 If you had touched that electric cable, you (be) elecrocuted.
WOULD HAVE BEEN
29 If the story hadn't been true, the newspaper (not print) it.
WOULDN'T HAVE PRINTED
30 I (not buy) things on the instalment system if I were you.
WOULDN'T BUY
31 Dial 999 if you (want) Police, Ambulance or Fire Brigade.
WANT
32 You (not be) any use to me unless you learn to type.
WON'T BE
33 If anyone attacked me, my dog (jump) at his throat.
WOULD JUMP
34 If he were in, he (answer) the phone.
WOULD ANSWER
35 The ship would have run around if the pilot (make) one mistake.
HAD MADE
36 I shouldn't have taken your umbrella if I (know) that it was the only one you had.
HAD KNOWN
Rewrite the second sentence so that it has smilar meaning to the first one
1.She couldn't afford to buy the car
->The car is too.....expensive for her to buy...........................
2.I would like you to help me to put the chair away
->Do you mind.........helping me ........to put the chair away........................................
3.If I were you, I wouldn't sweep the house on the work today?
->Do we.........sweep the house on the work today,don't we?...........................................................
5.Learining about other cultures is one of my interests
->I'm.........interested in Learining about other cultures.....................................................................
6.Unless he phones her immediately, he won't get any information
->If......he doesn't phone her immediately, he won't get any information............................................................................
7.It's very difficult to leave here after such a long time
->It isn't.....easy .......to leave here after such a long time.......................................................
8.Let's get together and talk about our presentation before we do it in class
->Why........don't we get together and talk about our presentation before we do it in class...............................................................
1 If you take more exercise, you can get fit
2 Unless we get help, we can't do the job
3 You should not to that
4 The sounds from a vacum cleaner can lead to permanent hearing loss
1. If you take more exercise, you will get fit.
2. Unless we get help, we can't do the job
3. You should not to do that
4. The sounds from a vacuum cleaner can lead to permanent hearing loss