cann't,cannot,can't,can not有什么区别

cann't,cannot,can't,can not有什么区别
cann't,cannot,can't,can not有什么区别

cann't,cannot,can't,can not有什么区别
cann't 没有这种说法
cannot 不能、无法=动词
can't 不能=情态动词否定=can not的缩写
can not 不能=情态动词否定=can't的原形