1. When did he leave school? 

When + did + S + V1? 

= How long is it since + S+ V2/ed?

= How long + has/have + S + V3/ed? 

2. The car is too expensive for us to buy.

S + be + too + ADJ + (for O) +to V: quá... đến nỗi không 

3. We didn't arrive early enough to see the film.

S + (not) + V + ADV + enough + (for O) + to V: (không) đủ .. để làm gì 

4. Unless you rest yourself, you will be ill.

Unless: trừ khi = If .. not 

If 1: If + HTĐ, TLĐ

5. It is the first time Nam has spoken to a foreigner.

S + has/have + not/never + V3/ed + ..  before

= It / This is the first time + S+ has/have + V3/ed 

6. How heavy is your suitcase? 

How + ADJ + be+ S? 

7. Your house isn't as big as mine.

S + be(not) + as +ADJ + as+ O : ss bằng 

8. The car is cleaned by my father every week.

S+ am/is/are + V3/ed: bị động - HTĐ

9. He asked me if I knew to speak English.

S + asked + O + if/whether + S + V (lùi thì)

HTĐ --> QKĐ

10. The job should be done tomorrow.

S + should be + V3/ed: bị động - modal verb 

`color{orange}{~MiaMB~}`