帮我翻译个句子,谢谢

What we should do, what we shouldn't do.

个人认为应该加we，不然没有所指的人，就成为病句了，不知你的想法如何？

What should I do and what shouldn't I do ?

What should be done and what shouldn't.

What should do, what shouldn't do.
我这个绝对对

what to do and what not( this is a question?)

口语中是不一定要加上所谓的主语的