Jawaban:

1. English and History lessons are studied by the children.

2. I am helped by my mother in the kitchen.

3. Water is drunk by it every morning.

4. The day examinations at school are done by the boys.

5. We are waited by him at school.

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1. Some (object) were bought by me yesterday.

2. Passive voice was taught by the teacher at school.

3. The letters were sent by the post man last week.

4. The house was cleaned by us yesterday.

5. Football was played by them in the yard

Penjelasan:

Active sentence itu seperti subject + predikat + object

(Susan cooks dinner)

Passive sentence itu seperti object + predikat + (oleh atau by) subject

(Dinner is cooked by Susan)