it's not和it isn't有什么差别?

it's not和it isn't有什么差别? 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 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's not my...和 it isn’t my. it isn't =it's not It's not = It isn't it isn't my shirt 与it's not my shirt有什么不同 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? Isn't it 和 is it区别有什么区别 It isn't=It is It's not=It is It isn't=It's I believe isn't true和I don't believe it's true有什么区别 this is not my ... 和 it isn‘t my ... 有什么区别么? 否定回答用No,it's not.和No,it isn't.哪个对 It's not bad.和It isn't bad.意思一样吗? it isn't fair和it's not fair的区别哪个对?哪个比较常用?