He was good for nothing now except navvy work.

他除了苦力外，什么也干不好了。

Yes, but such tales and stories are good for nothing.

是的，但是这样的故事是毫无用处的。

Everybody has his own merits and demerits. One should never think that he is perfect while others are all good for nothing.

每个人都有自己的优点和缺点，不要把别人都看成百无一是，把自己看成十全十美。

You're really good for nothing.

你真是一点用都没有。

In fact, he is good for nothing.

其实，他是个饭桶。