请把下列几句改为被动语态

the boy was seen run yesterday.
he is thought to be right
the bad food had not been thrown.
he would not be taken to beijing by them.
i was known by nobody in this town at that time.

我昨天看见男孩跑步了 我觉得他是对的 他现在把坏的食品丢掉了 他们不会带他到北京来 那个时候没人认识我

I saw the boy run yesterday. It was seen that the boy run yesterday.
I think that he is right. It is thought that he is right.
He had not thrown the bad food. The bad food had not been thrown by him.
They would not take him to Beijing. He would not been taken to Beijing by them.
Nobody knew me in this town at that time. I was not known in this town at that time.