isn't

英 [ˈɪznt]

美 [ˈɪznt]

is not 的常用口语形式

Collins.5

柯林斯词典

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？
This isn't highfalutin art-about-art. It's marvellous and adventurous stuff.
这不是一件纯粹为艺术而艺术的华而不实的东西，而是进行了大胆创新的非凡作品。
Isn't it about time that you pulled your finger out?
现在到了你该赶紧动起来的时候了吧？
It's a devil of a tricky problem, isn't it?
这是个非常棘手的问题，不是吗？
What is it then? Something's up, isn't it?
那是怎么回事呢？出问题了，是吗？
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？
Isn't he just the most beautiful thing you ever saw?
他难道不是你见过的最美的事物么？
But my world isn't your world, more's the pity.
可惜的是，我们是两个世界的人。
I suspect he isn't altogether unhappy about my absence
我猜想他对我的缺席并没有感到很不高兴。