G-27：good for nothing 一无是处

A:It seems that nobody in your class likes Paul.

A:好像你们班没有人喜欢保罗。

B:The boy is good for nothing.

B：他这个人一无是处。

A:As a teacher, I don't know how to help him.

A:作为一名老师，我不知道该如何帮助他。

B:He is hopeless.

B：他无药可救了。