It's not.还是 It isn't.

it isn't =it's not It's not = It isn't it is not的缩写是it isn`t还是it`s not? 是It isn't a pen.还是It's not a pen. It isn't=It is It's not=It is It isn't=It's it's not和it isn't有什么差别? it's not my...和 it isn’t my. it isn't和it's not的区别 It is not,It's not,It isn't 意思是一样的吗? 1）it is not 缩写是it’s not 还是it isn’t啊?2）还有you will 能缩写么?缩写是什么? It's her eraser 改为否定句 It‘s isn’t eraser 为什么用isn‘t 而不用not It 's really something,isn't it?