isn't

英 [ˈɪznt]

美 [ˈɪznt]

is not 的常用口语形式

Collins.5

柯林斯词典

But my world isn't your world, more's the pity.
可惜的是，我们是两个世界的人。
It's a love, isn't it?
真可爱啊，是不是？
This is another half-baked scheme that isn't going to work
这又是一个不靠谱的计划，是不会成功的。
Isn't it fantastic? Just look at that!
这是不是棒极了？看看那个！
He just isn't in your league.
他和你根本不是同类型的人。
My law practice isn't the most important thing in my life, you know.
你知道，我的律师事务所不是我生活里最重要的事情。
She's quite pretty, isn't she?
她长得挺美，不是吗？
Mummy is so nasty to me when Daddy isn't here.
爸爸不在这儿时，妈妈对我很凶。
It's a devil of a tricky problem, isn't it?
这是个非常棘手的问题，不是吗？
That isn't a value judgement, it's a fact.
那不是一个价值判断，而是一个事实。