1.you're not和you aren't

you are not的缩写是you're not还是you aren't? -you're from Australia,aren't you You're a boy ,aren't you? Are you not 和Aren't you?什么区别 You're a teacher,aren't ()? i suppose you're not serious.A don't i B do iC aren't you D you're a regular buster douglas,aren't you? Aren't you lucky!和Aren't you lucky? Aren't you happy?和Aren't you unhappy? 请问这里为什么要加to呢?parents aren't around to say,"No,you're not goi why do not you…和why do you not…,why aren't you able to…和why no you are not?no you aren't?