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- Mr Minh is nam father
->Nam is.Mr Minh's son. - Does your mother drive to work ever morning?
- ->Does your mother go to work by car ?
- My father go to work at six fifteen.
=> My father travels to work at six fifteen. - Does your class have fifty students ?
=> Are there fifty students in your class?

The lions are fed at 3 pm every day.
2. We got lost because we didn't have a map.
If we had had a map, we wouldn't have got lost.
3. I would prefer you to deliver the sofa on Friday.
I would rather you delivered the sofa on Friday.
4. The bridge was so low that the bus couldn't go under it.
It was such a low bridge that the bus couldn't go under it.
5. That was a silly thing to say.
What a silly thing to say!
6. We've run out of tea.
There isn't any tea left.
7. I last saw him when I was a student.
I haven't seen him since I was a student.
8. Susan was too excited to sleep.
Susan was so excited that she couldn't sleep.
9. Robert has not had a job for two years.
Robert has been unemployed for two years.
10. She will complete the work only she is paid extra.
She will not complete the work unless she is paid extra.
1. All the students love the principal. He is very kind. (because of)
All the students love the principal because of his kindness
2. I have forgotten the tickets. I’m sorry for it. (having)
I’m sorry for having forgotten the tickets.
3. I saw it with my own eyes. I believed it. (if)
If I hadn’t seen it with my own eyes, I wouldn’t have believed it.
4. The house at the end of the street has been sold. It has been empty for years. (which)
The house at the end of the street which has been empty for years has been sold.
5. It's a pity he doesn't take the doctor's advice. (wish)
I wish he took the doctor's advice.
1. The keepers feed the lions at 3 pm every day.
The lions are fed by the keepers at 3pm every day.
2. We got lost because we didn't have a map.
If we had had a map, we wouldn't have got lost.
3. I would prefer you to deliver the sofa on Friday.
I would rather you delivered the sofa on Friday.
4. The bridge was so low that the bus couldn't go under it.
It was such a low bridge that the bus couldn't go under it.
5. That was a silly thing to say.
What a silly thing to say!
6. We've run out of tea.
There is no tea left.
7. I last saw him when I was a student.
I haven't seen him since I was a student.
8. Susan was too excited to sleep.
Susan was so excited that she couldn't sleep.
9. Robert has not had a job for two years.
Robert has been unemployed for two years.
10. She will complete the work only she is paid extra.
She will not complete the work unless she is paid extra.
1. All the students love the principal. He is very kind. (because of)
-> Because of the principal's kindness, all the students love him.
2. I have forgotten the tickets. I’m sorry for it. (having)
-> I'm sorry for having forgotten the tickets.
3. I saw it with my own eyes. I believed it. (if)
-> If I hadn't seen it with my own eyes, I wouldn't have believed it.
4. The house at the end of the street has been sold. It has been empty for years. (which)
-> The house at the end of the street which has been empty for years has been sold.
5. It's a pity he doesn't take the doctor's advice. (wish)
-> I wish he took the doctor's advice.

Ex3. Join each pair of sentences using because, as or since.
1. He stopped the car. The traffic lights turned red. (because)
-> He stopped the car because the traffic lights turned red.
2. Jane didn’t join our programme. She had to take a summer course. (as)
-> As Jane didn't join our programme, she had to take a summer course.
3. He behaved very rudely. Everyone dis him. (since)
-> Since he behaved very rudely, everyone diss him.
4. They doing something useful. They do volunteer work. (because).
-> Because they doing something useful, they do volunteer work.
5. I won’t be able to attend the meeting. I’ll be on holiday with my family. (since)
-> I won't be able to attend the meeting since I will be on holiday with my family.
6. It was raining heavily. We decided to stay home and watch TV. (as)
-> As it was raining heavily, we decided to stay home and watch TV.
7. He wants to get fit. He’s training hard. (because).
-> Because he wants to get fit, he is training hard.
8. Sally was ill. She didn’t go to school yesterday. (since)
-> Since Sally was ill, she didn't go to school yesterday.
9. Jane stayed behind after the class in order to talk to the teacher. (because).
-> Jane stayed behind after the class because she wanted to talk to the teacher.
10. He was sick. He stayed at home.
-> He stayed at home because / as / since he was sick.