1. He is not old enough to get married.

(not) adj + enoguh + to V: (không) đủ ... để làm

2. Would you like to leave a message.

would like to V: muốn làm 

3. I used to watch that film when I was ten.

used to V: trước đây thường 

4. The weather is warm enough for us to go out.

(not) adj + enoguh + to V: (không) đủ ... để làm

5. They always help their mother to do the house work.

help sb to do st: giúp ai làm gì

6. You should wash your hands before meals.

should V: nên làm gì

7. Would you like to see a movie?

would like to V: muốn làm 

8. What about having fruits?

What about + Ving ... ?

9. You ought to wash your hands before meals.

ought to V: phải làm gì

10. The test is too difficult for the pupils to finish in time.

too adj (for O) to V: quá ... cho ai làm gì

11. It has taken me 3 hours to copy this document.

It takes O time to V: Ai tốn bao nhiêu thời gian làm gì

12. It's interesting/ posible/ difficult/ easy for us to join.

It's adj for O to V

13. It's very kind/ nice/ polite/ good of you to say so.

It's (very) of O to V

14. She is said to have a computer.