1. Let's have dinner at a beautiful restaurant (Câu đề nghị: What/How about + V_ing = Let's + V(inf)

2. A big present was given to me by Lan on my birthday (Bị động QKĐ: was/were + p.p)

3. I haven't seen him since 1985 (The last time + QKĐ + was + in + mốc thời gian = S + have/has + not + p.p + since + mốc thời gian)

4. My bag isn't as expensive as yours (your bag) (So sánh bằng: S1 + tobe + as + (not) + adj/adv + as + S2)

1. What about having dinner at a beautiful restaurant.

--> Let's have dinner at a beautiful restaurant.

2. Lan gave me a big present on my birthday party.

--> A big present was given by Lan on my birthday party

3. The last time I saw him was in 1985.

--> I haven't seen him since 1985

4. Your bag is more expensive than mine.

--> My bag isn't as expensive as yours 

* Cấu trúc:

+) What about + Ving = Let's + V (nguyên thể)

+) S + V - ed (quá khứ) + O --> O + was/ were + V - PII + by S + ...

+) The last time + S + V - PII + was + mốc thời gian 

= S + hasn't/ haven't + V - PII + since + mốc thời gian