can't是cannot 还是can not don't呢?

can't是cannot 还是can not don't呢? cannot 的缩写是cann't 还是can't? can't和cannot用法一样吗,还是有区别 cannot等于can't吗? can not=cannot=can't ? cannot can't couldn't mustn't的问题1.cannot = mustn't 是不准?那can't呢?2.can是不能够,may是不可能 对不?3.cannot can't couldn't之间的不同 cann't,cannot,can't,can not有什么区别 can't与cannot的区别是什么? cannot和can't用法的区别 cannot 和 can't 的区别 cannot 和can't的区别 can't =cannot 的用法 can't 和cannot有什么不同 can`t cannot can not有没有区别 can not的缩写是can't还是cann't? “Cannot is usually contracted to can't为什么contract用的是过去式呢 can not和cannot的区别是什么?can not cannot 和can't 的区别是什么呀? can与not中间能否无空格?cannot can not can't不急！