1.我知道你想要什么。

2. 就是这个缘故，你才不想回家的吗？

3.我很肯定我们可以帮你做成一笔好交易。

4.你愿意帮我写报告吗？

5.我不知道他是全世界上最有钱的人。

游客，如果您要查看本帖隐藏内容请回复

I know what you want.

Is that the reason you did not want to go home?

I am sure that I can help you to make a good deal.

Do you want help me write the report?

I don't know that he is the richest man in the world.

版主请问：i don't know that he is the richest man in the world.这句，为什么要用was the richest，不能用 is the richest?按理说他现在也应该很有钱，是一个不变的事实。可以用一般现在时啊。

谢谢解答。

I know what you want.

Is that the reason you did not want to go home?

I am sure that I can help you to make a good deal.

Do you want help me write the report?

I don't know that he was the richest man in the world.