isn't

英 [ˈɪznt]

美 [ˈɪznt]

is not 的常用口语形式

Collins.5

柯林斯词典

My bank balance isn't very large.
我的银行存款余额不多了。
What is it then? Something's up, isn't it?
那是怎么回事呢？出问题了，是吗？
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。
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。
Mummy is so nasty to me when Daddy isn't here.
爸爸不在这儿时，妈妈对我很凶。
Perhaps he isn't coming.
他许不来了。
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。
She's quite pretty, isn't she?
她长得挺美，不是吗？
Isn't that enough for you?
那对你来说不够吗？
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。