`\color{green}{#Queen}`

Đáp án `+` Giải thích các bước giải:

`1.` A Christmas tree was decorated in the early 1500s.

`-` $\text{QKĐ : S + was / were + P.P (by O)}$

`2.` A fire is made in rice - cooking contest.

`-` $\text{HTĐ : S + am / is / are + P.P (by O)}$

`3.` The new bridge was being built when we came

`-` $\text{QKTD : S + was / were + being + P.P (by O)}$

`4.` The shop will be opened tomorrow 

`-` $\text{TLĐ : S + will + be + P.P (by O)}$

`6.` This programme is being watched by about thirty million people.

`-` $\text{HTTD : S + am / is / are + being + P.P (by O)}$

`7.` The result of the exam has already been announced

`-` $\text{HTHT : S + have / has + been + P.P (by O)}$

`-` Lưu ý : Các trạng từ luôn đứng giữa have / has và been trong câu bị động

`8.` Thousands of CD machines have been sold since 1983

`-` $\text{HTHT : S + have / has + been + P.P (by O)}$

` 1 . ` A Christmas tree was decorated  in the early ` 1500`s

- Câu bị động thì quá khứ đơn : S + was / were + ( not ) + V3 + ( by O ) 

` 2 . ` A fire is made in rice - cooking contest 

- Câu bị động thì hiện tại đơn : S + is / am / are + (not) + V3 + ( by O )

` 3 . ` The new bridge was being built when we came

- Câu bị động thì quá khứ tiếp diễn : S + was / were + being + V3 + ( by O ( 

` 4 . ` The shop will be opened tomorrow 

- Câu bị động thì tương lai đơn : S + will(not)be + V3 + ( by O ) 

` 6. ` This programme is being watched by about thirty million people 

- Câu bị động thì hiện tại tiếp diễn : S + is / am / are + ( not ) + being + V3 + ( by O ) 

` 7 . ` The result of the exam has already been announced

- Câu bị động thì hiện tại hoàn thành : S + have / has + (not) + been + V3 + ( by O )

`8 . ` Thousands of CD machines have been sold since ` 1983 `