isn't

英 [ˈɪznt]

美 [ˈɪznt]

is not 的常用口语形式

Collins.5

柯林斯词典

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？
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。
My bank balance isn't very large.
我的银行存款余额不多了。
But my world isn't your world, more's the pity.
可惜的是，我们是两个世界的人。
Awfully hot, isn't it?
非常热，是不是？
Perhaps he isn't coming.
他许不来了。
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？
Isn't it fantastic? Just look at that!
这是不是棒极了？看看那个！
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。
It's a devil of a tricky problem, isn't it?
这是个非常棘手的问题，不是吗？