`16.` Her friends are often made to do her housework.

`-` S + make + sb + V-inf 

`->` S + be + made + to + V-inf : bắt ai đó làm gì

`-` Có thể lược bỏ by her.

`17.` I was let play computer games by my father at the weekend.

`-` S + let + sb + V-inf

`->` S + let + sb/st + be P2 : cho phép ai làm gì

`18.` The children were made to buy a lot of wine for this man.

`-` S + make + sb + V-inf 

`->` S + be + made + to + V-inf : bắt ai đó làm gì

`-` Children số nhiều `->` chia were

16. She often makes her friends do her housework.

⇒ Her friends often do her housework . 

17. MY father lets me play computer games at the weekend.

⇒ I play computer games at the weekend 

18. This man made the children buy a lot of wine for him.

⇒ The children buy a lot of wine for this man