It's too good to be true.
太好了以至于不敢相信是真的；难以置信

too...to....
太....以至于不....

This dress is too old to wear.
这件衣服太旧了，以至于不能穿。

The boy is too young to go to school.
男孩太小了，还没到上学的年龄。


I won the lottery.It's too good to be true.
我中了彩票，简直难以置信。

I'm going to the Finals.It's too good to be true.
我要进总决赛了，简直难以置信。

All the goods are on sale,eighty percent off.It's too good to be true.
所有的商品都打两折，简直难以置信。

168'