1. Would you mind if I went out with my friends at night? 

(Công thức câu điều kiện loại 2: Would + S1 + V1 if S2 + V2( chia thì quá khứ đơn) ... ? )

2. Ann asked me if Ha Long Bay was a wonder of the world.

( Công thức câu gián tiếp: S + asked/ wondered/ wanted to know + if/ whether + S +V… )

3. Their house was decorated for the Tet holiday last weekend.

( Công thức câu bị động: S + be PII. )

4. Why don’t we go shopping?

( Let's = Let us + V (infinitive)

---> Why don’t we/ you + V (infinitive) ? )

1. Would you mind if i went out with my friends at night?

 - Would you mind if + S +Ved/V2 ? Ví dụ: Would you mind if we turned off the TV?

 - Do you mind if+S + Vo? Ví dụ: Do you mind if i use the remote?

2. Ann asked me whether/if Ha Long Bay was a wonder of the world.

 - Câu tường thuật ở dạng câu hỏi: S+ asked+if/whether+ S + V (lùi thì).

3. Their house was decorated for the Tet holiday last weekend.

4. Why don't we go shopping?

 - Why don't we+ Vo?: Lời mời gợi ý làm gì đó....

 - Ngoài "Why don't we..?" ra, ta còn có: What about+V-ing, How about+V-ing, Let's+Vo,...

Học tốt!!!