1. How long is it since he left school?
=> When did he leave school ?
2. We can't afford to buy this car.
=> The car is too expensive for us to buy.
3. We arrived too late to see the film.
=> We didn't early enough to see the film.
4. If you don't rest your self,you'll be ill.
=> Unless you rest yourself, you will be ill.
5. Nam has never spoken to a foreign before.
=> It is the first time Nam has ever spoken to a foreign.
6. What is the weight of your suitcase?
=> How heavy is your suitcase ?
7. My house is bigger than yours.
=> Your house isn't as big as mine.
8. My father cleans the car every week.
=> The car is cleaned by my father every week.
9. "Do you know to speak English" He asked me.
=> He asked me if I knew to speak English.
10. Someone should do this job tomorrow.
=> The job should be done tomorrow.
P/s: Chúc bạn học tốt