Hello, May I ask a question? I was trying to make sentences expressing the meaning of  "I can't do it, and you can't either." I've made several sentences but I wonder if they are all correct. Please check them out for me, OK? I'd appreciate your help!

You and I cannot do it.

You or I cannot do it.

You nor I cannot do it.

Not either you or I can do it.

Neither you  nor I can do it.

I know some of them might not idiomatic enough, but I'm not sure which of them are. So if possible, could you tell me which of those are not idiomatic too? Thank you very much!

※The last two sentences were corrected.

Grammar Geek wrote:

Hi Viceidol, You nor I cannot do it. Neither you nor I can do it. Either you or I can do it. I'm not sure which meaning you had in mind. Either you or I cannot do it. Neither you  nor I cannot do it.

I'm sorry that I've made a mistake. The fourth and fifth sentences should be "Not either you or I can do it." and "Neither you nor I can do it.", both of them should mean "We cannot do it."

Are those correct?  Thank you, Barbara!