can not和cannot的区别是什么？

can't用于口语
cannot和can not都是书面语，不过can not语气更加强烈，两者应该都属于正式用于，报刊杂志常见，但不见can't。

应该是没什么区别不过我很少看人用 can not 一般都是 cannot 或 can't 我一般都用can't，用cannot的时候就是想emphasize 下真的不能

To say that you are not able to do something, you say "you cannot" or "you can't (more colloquial口语). 但"can not" is NOT 书面语! It is only a grammatical error. It should always be spelled together and like "cannot". Please read New York Times or other journals or newspapers to see if "can not" actually exists.

区别在于：
can not：非常正式
cannot：较正式
can't：口语化

there is no difference la.