I.

1. My homework was done carefully

2. The house was built from wood

3. These cars were made in Japan

4. The car was washed last Sunday 

5. My questions wasn't answered

II. 

1. By the time I had done all of my homework, Mom washed all the dishes

⇒ Đúng lúc tôi làm xong hết bài tập thì mẹ đã rửa xong hết bát đũa rồi

2. The walls of the castle were made of strong bricks to keep the kings and their family safe

⇒ Bức tường của lâu đài được xây bằng những viên gạch chắc chắn để giữ cho vua và gia đình của họ an toàn

3. There used to be many citadels in Vietnam but there are only a few left

⇒ Ở Việt Nam đã từng có nhiều thành quách nhưng nay chỉ còn lại một số ít.

$#thanhmaii2008$

Công thức:
S + V2/ed + O ...
S + was / were + V3/ed + (by O) ...

S + didn’t V1 + O ...
S + was / were + NOT + V3/ed + (by O) ...

II. Change the following sentences into Passive Voice.
1. I did my homework carefully.
My homework was done carefully.
2. He built the house from wood.
The house was built from wood.
3. People made these cars in Japan.
These cars were made in Japan.
4. My father washed the car last Sunday.
The car was washed by my father last Sunday.
5. Tuan didn’t answer my questions.
My questions weren’t answered by Tuan.

III. Rearrangement: 
1. By the time / I had done / all the dishes, / all of my homework./ Mom washed /
→ By the time Mom washed all the dishes, I had done all of my homework.
2. were made / of strong bricks / The walls of the castle / the kings and their family safe. / to keep /
→ The walls of the castle were made of strong bricks to keep the kings and their family safe.
3. There used to be / in Vietnam, / but there are / many citadels / only a few left. /
→ There used to be many citadels in Vietnam, but there are only a few left.