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。
She's quite pretty, isn't she?
她长得挺美，不是吗？
This is another half-baked scheme that isn't going to work
这又是一个不靠谱的计划，是不会成功的。
Isn't it fantastic? Just look at that!
这是不是棒极了？看看那个！
It isn't too difficult once you get the idea
你一旦弄懂了，就不太难了。
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。
My bank balance isn't very large.
我的银行存款余额不多了。
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。
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？
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。