1. I lose the key, so I cannot get into the house.
-> If I didn't lose the key, I could get into the house.
2. They are too young to join the army.
-> They are not old enough to join the army.
3. She won't come unless you invite her
-> If you don't invite her, she won't come.
4. We can't hang the picture on the wall. It is heavy.
-> The picture too heavy to hang on the wall
5. They were tired. They were hungry.
-> They were not only tired but also hungry
6. They finish their work. They went home.
-> Finishing their work then they went home
7. She goes out in the rain. She gets wet.
-> If she didn't go out in the rain, she wouldn't get wet
8. Tom can't lift the table. He isn't strong enough.
-> Tom is too weak to lift the table

1. I lose the key, so I cannot get into the house.
-> If I didn't lose the key , I could get into the house
2. They are too young to join the army.
-> They are not old enough to join the army .
3. She won't come unless you invite her
-> If you don't invite her , she won't come
4. We can't hang the picture on the wall. It is heavy.
-> The picture is too heavy for us to hang on the wall .
5. They were tired. They were hungry.
-> They were not only tired but also hungry .
6. They finish their work. They went home.
-> Finishing their work , then they went home .

7. She goes out in the rain. She gets wet.
-> If she didn't go out , she wouldn't get wet .
8. Tom can't lift the table. He isn't strong enough.
-> Tom isn't strong enough to lift the table 

a.I lose the key,so I cannot get into the house
➝If.......I didn't lose the key, I could get into the house..........
b,They are too young to join the army
➝They are not......old enough to join the army.............
c,She won't come unless you invite her
➝If......you don't invite her, she won't come................
d,We can't hang the pictureon the wall.It is heavy
➝The picture......is too heavy for us to hang on the wall..............
e,They were tired.They were hungry
➝They were not only.....tired but also hungry.............
f,They finish their work.They went home
➝Finishing.......their work, then they went home..............
g,She goes out in the rain.She gets wet
➝If........she didn't go out, she wouldn't get wet................
h,Tom can't lift the table.He isn't strong enough
➝Tom is.......not strong enough to lift the table ...............

a.I lose the key,so I cannot get into the house
➝If..................i didn't lose the key, i could get into the house
b,They are too young to join the army
➝They are not....................old enought to join the army
c,She won't come unless you invite her
➝If......................you don't invite her, she won't come
d,We can't hang the pictureon the wall.It is heavy
➝The picture....................is too heavy for us to hang on the wall
e,They were tired.They were hungry
➝They were not only..................tired but also hungry
f,They finish their work.They went home
➝Finishing.....................their work, They went home
g,She goes out in the rain.She gets wet
➝If..................she goes out in the rain, she will get wet
h,Tom can't lift the table.He isn't strong enough
➝Tom is..................too weak to lift the table

Viết lại câu:

1. Your work is better than mine

-> My work........is not as good as yours..............................................................

2.Dick is the youngest in the family.

-> Nobody...............is younger than dick in the family..............................................................

3. I lose the key, so I'can get into the house,

-> If.................i didn't lose they key, i could get into the house,......................................................

4.They are to young to join the army

-> They are not......old enough to join the army...............................................................

5. She won't come unless you invite her.

-> If.........you invite her, she will come.............................................................................

6. We can't hang the picture on the wall. It is heavy.

-> The picture.........is so heavy for ú to hang on the wall..............................................................

7. They were tired. They were hungry.

-> They were not only..............tired but also hungry..............................................

8. They finish their work. They went home.

-> Finishing.................their work, They went home....................................

1. Your work is better than mine

-> My work is not as good as yours

2.Dick is the youngest in the family.

-> Nobody in the family is younger than Dick :>>>>>

3. I lose the key, so I'can get into the house,

-> If i didn't lose the key, i could get into the house

4.They are to young to join the army

-> They are not old enough to join the army

5. She won't come unless you invite her.

-> If you don't invite her, She won't come

6. We can't hang the picture on the wall. It is heavy.

-> The picture is too heavy to be hang on the wall

7. They were tired. They were hungry.

-> They were not only tired but also hungry.

8. They finish their work. They went home.

-> Finishing their work, they went home

a) I lose the key, so I cannot get into the house => If I didn't lose the key, I could get into the house. 

b) They finish their work. They went home => Finishing their work, then they went home. 

 1. I lose the key. so I cannot get into the house

 -> If I didn't lose the key , I could get into the house.

 2. They finish their work. They went home.

 -> Finishing their work , then they went their home .

Nếu viết chỉ bằng if thì chỉ có 1 cách thôi nha

1/We dont have a lot of money, so we dont buy a lot of new books

=> If we had a lot of money, we would buy a lot of new books

2/I cannot take a photo of us because I can't find my camera.

=> If I found my camera, I could take a photo of us

3/Ilose the key, so I cannot get into the house.

=> If I didn't lose the key, I could get into the house

4/I am not free today, so we can't go to the beach.

=> If I were free today, we could go to the beach

5/ She doesn't know the answers, so she cant tell you.

=> If she knew the answers, she could tell you

Complete the sentences, using the correct form of the words in brackets.

1. They are too young to join the army

They are not ...............old enough to join the army..........................

2. She won't come unless you invite her.

If ..................you don't invite her, she won't come.......................

3. We can't hang the picture on the wall.It is heavy

The picture ..........is too heavy for us to hang it on the wall....................

4. They were tired.They were hungry

They were not only ..........but also hungry...................

5. They finish their words.They went home.

Finishing ..............their work, they went home.......................

6. Tom can't lift the table.He isn't strong enough

Tom is ...............too leak to lift the table..........................

7. Although the weather was bad, it did not delay the traffic

In spite of/ Despite of the bad weather, it did not delay the traffic.

1. They are too young to join the army

They are not ...............old enough to join the army..........................

2. She won't come unless you invite her.

If ..................you don't invite her, she won't come.......................

3. We can't hang the picture on the wall.It is heavy

4. They were tired.They were hungry

They were not only ..........but also hungry...................

5. They finish their words.They went home.

Finishing ..............their work, they went home.......................

6. Tom can't lift the table.He isn't strong enough

Tom is ...............too leak to lift the table..........................

7. Although the weather was bad, it did not delay the traffic

1) The schoolchildren sowed some seeds, but they forgot to water them so they didn't grow.->If the children......hadn't forgot to water some seeds, they would have grown.................

2) They don't understand the problem. They won't find a solution.->Should.......they understand the problem, they will find a solution..............

3.He sits around too much. He isn't fit.->Were....he to sit around to much, he would be fit.............

4.Rita is exhausted today because she didn't get any sleep last night.->Had......rita got sleep last night, she would be exhausted today...............

5.She's very thin; perhaps that's why she feels cold so much.-> If she......wasn't thin, she wouldn't cold so much.......................

6.He never polishes his shoes, so he never looks smart.-> If he.......polished his shoes, he would look smart................

7.He can't park near his office; that's why he doesn't come by car.-> If he........could park near his office, he would come by car..............

8. My house is guarded by two big dogs. That's the only reason it isn't broken into every night.->If my house..........weren't guarded by 2 big dogs, it would be broken into everynight........

9.The flats are not clearly numbered, so it is very difficult to find anyone.-> If the flats.....were clearly numbered, it wouldn't be very difficult to find............................

10.I don't know her e-mail address, so I can't tell you.->Were.....i to knew her email address, i could tell you.................

1. The police (pay)....paid....no attention to her complaint because she (phone)....had phoned....them so many times before.

2. During the previous week, I (go).....went ....to the gym every morning.

3. By the time I (get)....got...back to the bathroom,the bath (overflow).....had overflown.....

4. The boy told me that he (lose)..had lost....his money and (not/know)...didn't know...how he would get home.

5. I was just about to leave when I (remember) .....remembered....my briefcase.

6. She (walk)...walked...into the station only to find that the train (leave)...had left...

7. At the conference, scientists reported that ehy (find)...had found..a cute for malaria.

8. By the time I(get)...got...to the party, most people (go)...had gone...home.

9. As soon as I (turn)....turned....the ignition key,the engine (catch).....caught...fire.

10. After they (eat)...had eaten...all the food,they (pick)....picked....up their bags and left.

11. When she (come)...came...into the hall, everyone (start)...started..cheerting.

1. The police (pay) paid no attention to her complaint because she (phone) had phoned them so many times before.

2. During the previous week, I (go) went to the gym every morning.

3. By the time I (get) got back to the bathroom,the bath (overflow) had overflown.

4. The boy told me that he (lose) had lost his money and (not/know) didn't know how he would get home.

5. I was just about to leave when I (remember) remembered my briefcase.

6. She (walk) walked into the station only to find that the train (leave) had left.

7. At the conference, scientists reported that ehy (find) had found a cute for malaria.

8. By the time I(get) got to the party, most people (go) had gone home.

9. As soon as I (turn) turned the ignition key,the engine (catch) caught fire.

10. After they (eat) had eaten all the food,they (pick) picked up their bags and left.

11. When she (come) came into the hall, everyone (start) started cheerting.

Good luck!

VIII- Join each of the following pairs of sentences with “or, and, but, so or because”

1. I told a joke. Nobody laughed.

I told a joke, but nobody laughed

2. You must study harder. You will go into another class.

You must study harder or you will go into another class

3. The city suffers from air pollution. The city suffers from water pollution.

The city suffers from air pollution and water pollution

4. I knew her family. I did what I could for her.

I knew her family so i did what i could for her

5. We can’t afford energy-saving light bulbs. The light bulbs are too expensive.

We can't afford energy-saving light bulbs because the light bulbs are too expensive

IX. Put the verbs in the right tense or form

1. If he (learn) ______learned______ to drive, he would be able to drive his car.

2. They will lose their way if they (not have) ______don't have______ a map.

3. If the students (attend) ____attend_____ Quang Trung school, they have to wear uniform.

4. Frogs and toads (die) ____will die______ a lot if people continue to use electricity to catch fish.

5. If Lan (not have) ____doesn't have______ a bicycle, she will not go camping with us.

6. His father would buy that house if it (not be) ______weren't________ expensive.

7. If students do not throw plastic bags anymore, our school yard (clean) _____will be clean______.

8. I would do the test in five minutes if it (not be) ______weren't_______ difficult

IX. Put the verbs in the right tense or form

1. If he (learn) _____learned_______ to drive, he would be able to drive his car.

2. They will lose their way if they (not have) ______don't have_______ a map.

3. If the students (attend) ____attend_____ Quang Trung school, they have to wear uniform.

4. Frogs and toads (die) _____will die_____ a lot if people continue to use electricity to catch fish.

5. If Lan (not have) ____doesn't have______ a bicycle, she will not go camping with us.

6. His father would buy that house if it (not be) _______weren't_______ expensive.

7. If students do not throw plastic bags anymore, our school yard (clean) _____will clean______.

8. I would do the test in five minutes if it (not be) ________weren't_____ difficult