no its not和no it isnt的區別

it isn't 強調在it上，強調是“它”不是，不是別的東西不是，it's not相反，強調是“不是”。

its not和it isnt用法是一樣的，無太大差別。

例句：

Its not nearly as hot as last year.

天氣絕沒有去年那麼熱。

It isnt always easy to separate the wheat from the chaff.

分清好壞並不總是容易的。