1. They did the housework then they went to the cinema

-> After they had done the housework, they went to the cinema.

(After + QKHT , QKĐ)

2. The traffic was bad so we were late

-> Due to the bad traffic, we were late.

(Due to + N = Because of + N)

3. They are late so they miss the film

-> If they weren't late, they wouldn't miss the film.

(If + S + QKĐ, S + would + V-nt)

4. Clean your room or you can't go out with your friends

-> If you don't clean your room, you can't go out with your friends.

(If + S + HTĐ, S will + V-nt)

5. We had lunch then we took a look around the shops

-> Before we took a look around the shops, we had had lunch.

(Before + QKĐ, QKHT)

6. The light had gone out before we got out of the office

-> When we got out of the office, the light had gone out.

(When QKĐ, QKHT)

7. After she had explained everything clearly, we started our work

-> By the time we started our work, she had explained everything clearly.

(By the time + QKĐ, QKHT)

8. Playing in the sun is good for children

-> It is good for children to play in the sun.

(It’s adj (for sb) to do sth)

9. Carelesss driving leads to many accidents every year

-> Careless driving results in many accidents every year.

(result in + N= lead to + N)