`1`. The Statue of Liberty was presented by France in `1876`.

`-` Bị động QKĐ: S + was/were + VpII + (by O)

`2`. Nam asked me if my grandparents still lived in Nha Trang then.

`-` Câu tường thuật: S + asked + O + if + S + V(lùi thì)

`-` HTĐ `->` QKĐ

`-` now `->` then

`3`. If we don't reduce the use of water and electricity, we'll have to pay more this month. 

`-` Câu điều kiện loại `1`: If + S + V(-s/es), S + will + V-inf

`4`. My father cooks better than my mother.

`-` So sánh hơn: S1 + V + adv-er/more adv + than + S2

`5`. Although she performed well, she didn't receive good comments.

`-` Although + S + V, S + V: Mặc dù

1. The Statue of Liberty was presented to the USA in 1876.

S + was/were + V3/ed (bị động - thì QKD)ư

2. Nam asked me if my grandparents still lived in Nha Trang then.

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

HTĐ --> QKĐ

now --> then

3. If we don't reduce the use of water and electricity, we'll have to pay more this month.

If loại 1: If + HTĐ, S + will/can/shall + V1

4. She hasn't worn that dress since her sister's wedding.

S + last + V2/ed + time 

--> S + has/have + not + V3/ed + for/since + time

5. My father cooks better than my mother.

S + be/V + better than + O : so sánh hơn

6. Although she performed well, she didn't receive good comments.

Although + clause, clause: mặc dù 

`color{orange}{~LeAiFuRuiHuiBao~}`