1. Her grandparents were visited by my girlfriend two weeks ago.

(Bị động thì QKĐ: was/ were + PII)

2. Many new roads will be built in this city.

(Bị động thì TLĐ: will be PII)

3. If he had prepared well for the test, he would have got good mark.

(Câu điều kiện loại ba-> diễn tả sự việc trái với quá khứ: If + S1+ had+ PII, S2+ would + have+ PII)

4. If he hadn't watered the tree very often, it wouldn't have grown well.

(Câu điều kiện loại ba)

5. If Linda contacted with her relatives, she would know where they lived. 
(Câu điều kiện loại hai-> diễn tả sự việc trái với hiện tại: If + S1+ V2/ Ved, S2+ would + V)

6. If Phuong hurried, she wouldn't miss the bus.

(Câu điều kiện loại hai)

7. My grandfather does the morning exercises to be stronger.

(to + V: để làm gì-> chỉ mục đích)

8. I closed the door so as not to be disturbed.

(so as not to V: để không làm gì)

`1`.Her grandparents were visited by my girlfriend two weeks ago

`\rightarrow` Câu bị động `-` Thì QKĐ : S + was / were + V3 / PII ( by O )

`2`.Many new roads will be built in this city

`\rightarrow` Câu bị động `-` Thì TLĐ : S + will be + V3 / PII ( by O )

`3`.If he had prepared well for the test , he would have got good mark

`\rightarrow` CĐK Loại 3 ( `3 , 4` ) :

`-` If - clause : Thì QKHT : S + had + V3 / PII

`-` Main - clause : Thì TLHT trong QK : S + would have + V3 / PII

`4`.If he hadn't watered it very often , the tree wouldn't have grown well

`5`.If Linda contacted with her relatives , she would know where they lived

`\rightarrow` CĐK Loại 2 ( `5 , 6` ) :

`-` If - clause : Thì QKĐ : S + Ved / V2

`-` Main - clause : Thì TLTQK : S + would + V

`6`.If Phuong hurried , she wouldn't miss the bus

`7`.My grandfather does the morning exercises so as to be stronger

`\rightarrow` Clause + so as ( not ) to / in order ( not ) to + V ( `7 , 8` )

`8`.I closed the door in order not to be disturbed

`\text{@ TheFox}`