it's not 和it isn't 用法上的区别

it's not my...和 it isn’t my. it's not和it isn't有什么差别? it isn't =it's not It's not = It isn't 否定回答用No,it's not.和No,it isn't.哪个对 Is it a pen?否定回答用No,it's not.和No,it isn't.哪个对 it isn't和it's not的区别看好了 是it isn't和it's not 请教一下 谢谢 No,it isn’t.和 It is not.No,it isn’t.和It is not.It is not Bill’s dictionary.能不能改成 it isn’t Bill’s dictionary.可不可以呢,若可以为什么呢? It isn't=It is It's not=It is It isn't=It's it's not you,is it?和it's you,isn't it?的意思一样么?有什么区别? 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 not bad.和It isn't bad.意思一样吗? It isn`t English和 It`s not English有什么不同?一样不 英文中,it isn’t 和 it’s not 有什么区别? It isn't和It's not有什么区别?在句首? it isn't fair和it's not fair的区别哪个对?哪个比较常用? :It's not 和It isn't 区别在哪啊? it's not 和it isn't 用法上的区别