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。
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。
She's quite pretty, isn't she?
她长得挺美，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。
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。
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 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。
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？
Isn't that enough for you?
那对你来说不够吗？
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。