将下列句子变为被动语态怎么做？求大神速来解答！！！！！！
1. He often helps his brother.
2. People all over the world know the Great Wall.
3. They founded that hospital in 1996.
4. He was doing his homework at this time yesterday.
5. He asked me to work on the farm with him.
6. My father is mending my bike.
7. The writer has written many stories for that magazine.
8. We’re going to hold a meeting this afternoon.
9. His mother had told him not to waste time on fishing.
10. We should make a plan at once.
2）翻译（要求全部用被动语态）：
1. 据说他下个月来这里。
2. 有人看见他在花园里干活。
3. 他的父母给他买了一辆新自行车。
4. 这孩子现在正有他的祖父母照看着。
5. 这个货三天之内干不了。
6. 你们的教室必须保持干净。
7. 我忘了他的电话号码。
8. 这台电脑是上个月买的。 展开
1. He often helps his brother.
His brother is often helped by him.
2. People all over the world know the Great Wall.
The Great Wall is known by people all over the world.
3. They founded that hospital in 1996.
That hospital was founded in 1996 by them.
4. He was doing his homework at this time yesterday.
His homework was being done by him at this time yesterday.
5. He asked me to work on the farm with him.
I was asked to work on the farm with him.
6. My father is mending my bike.
My bike is being mended by my father.
7. The writer has written many stories for that magazine.
Many stories have been wirtten by the writer for that magazine.
8. We’re going to hold a meeting this afternoon.
A meeting is going to be held this afternoon.
9. His mother had told him not to waste time on fishing.
He has been told by his mother not to waste time on fishing.
10. We should make a plan at once.
A plan should be made at once.
二
It is said that he will come here next month.
He has been seen working in the garden.
A new bike has been bought him by his parents/
These children are being taken care of by their grandparents.
The job has not been finished within three days.
Your classroom must be kept clean.
His telephone number has been forgotten by me.
This computer was bought last month.
