1. How long has it been since he left school?
→ When did he leave school?

2. We can't afford to buy the car.
→ The car is too expensive for us to buy.

3. We arrived too late to see the film.
→ We didn't arrive in time to see the film.

4. If you don't rest yourself, you will be ill.
→ Unless you rest yourself, you will be ill.

5. Nam has never spoken to a foreigner before.
→ It is the first time Nam has spoken to a foreigner.

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 how to speak English?" He asked me.
→ He asked me if I knew how to speak English.

10. Someone should do the job tomorrow.
→ The job should be done tomorrow.