isn't

英 [ˈɪznt]

美 [ˈɪznt]

is not 的常用口语形式

Collins.5

柯林斯词典

This isn't the first hare-brained scheme he's had.
这已经不是他制定的第一个愚蠢方案了。
It's a devil of a tricky problem, isn't it?
这是个非常棘手的问题，不是吗？
Isn't it fantastic? Just look at that!
这是不是棒极了？看看那个！
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。
Not all is perfect, but it isn't for want of trying.
一切并非无可挑剔，但已经竭尽全力了。
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？
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。
What is it then? Something's up, isn't it?
那是怎么回事呢？出问题了，是吗？
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。
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？