為你解答.
1、I water flowers every day.
Flowers are watered by me every day.

2、He often makes Mrs Green laugh.
Mrs Green is often made to laugh by him.

3、she often hears Peter sing in the next room.
Peter is often heard to sing in the next room.

4、The doctor made one of the children try the new medicine.
One of the children was made to try the new medicine by the doctor.

5、Many students enjoy cartoon films in our school.
Cartoon films are enjoyed by many students in our school.是不是看到make改為被動語態(tài)就是made to do？make的用法：主動語態(tài)make sb do，被動語態(tài)be made to do，在動詞原形前是要加上一個to。