`6.` This light is turned off at night

`-` Cấu trúc bị động HTĐ: S + am/ is/ are + VpII + (by O)

`-` This light là số ít `->` is

`7.` Grass is eaten by some animals

`-` Cấu trúc bị động HTĐ: S + am/ is/ are + VpII + (by O)

`-` Grass là danh từ không đếm được `->` is

`8.` A plastic flower vase was made by Mai and Hoa

`-` Cấu trúc bị động QKĐ: S + was/ were + VpII + by O

`-` A plastic flower vase là số ít `->` is

`9.` My motorbike must be washed 

`-` Cấu trúc bị động với ĐTKT (must) : S + must + be + VpII + (by O)

`10.` Uniform must be worn at school by students

`-` Cấu trúc bị động với ĐTKT (must) : S + must + be + VpII + (by O)

$\text{6. This light is turned off by us}$

Công thức: S + is/am/are + v3/ed + o (object)

$\text{7. Grass are eaten by some animals}$

$\text{8. A plastic flower vase was made by Mai and Hoa}$

Công thức: S + was/were + v3/ed + (by Sb) + o (object)

$\text{9. My motorbike must be washed by me}$

Công thức: S + must be + v3/ed + (by Sb) + o (object)

$\text{10. Uniform must be wore by students}$