isn't

英 [ˈɪznt]

美 [ˈɪznt]

is not 的常用口语形式

Collins.5

柯林斯词典

Merely because you believe a thing is right, it isn't automatically so
事情不会仅仅因为你相信它是对的，就会必然如此。
Mummy is so nasty to me when Daddy isn't here.
爸爸不在这儿时，妈妈对我很凶。
I'm sure you've got it wrong. Kate isn't like that
我敢保证你弄错了，凯特不是那个样子的。
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？
Isn't that enough for you?
那对你来说不够吗？
It's past the appointed time. Maybe he isn't coming.
约定的时间都过了，别是他不来了吧？
He just isn't in your league.
他和你根本不是同类型的人。
Awfully hot, isn't it?
非常热，是不是？
My bank balance isn't very large.
我的银行存款余额不多了。