1) you are all wet.

你完全错了.
3) You are far from right; you are completely wrong.

你决不是对的;你完全错了。
4) You have got it all wrong.

你全搞错了。
5) I am quite at fault.

我完全错了。
6) get the wrong end of the stick

完全搞错了;完全误解了
参考词条