is not是英語中的一個常見短語，is not通常理解為否定的意思或“不是”，is not在英語中可用縮寫的形式出現，也即是isn't，它經常用在反義疑問句里，表示強調的作用。

is not的縮寫形式

is not縮寫形式是isn't。與not相關的否定縮寫：通常在原詞后加n't，若原詞以n結尾，直接加't。

系動詞be、助動詞、情態動詞的否定形式一般可以縮寫成為一種簡略的形式。

如：is not—isn't、are not—aren't、was not—wasn't、were not—weren't、has not—hasn't、have not—haven't、will not—won't、do not—don't、did not—didn't、used not to—usedn't / didn't use to。

擴展資料：

1、含有 am is are的時候，使用縮寫形式如：I'm=I am；she's=she is；he's=he is；it's=it is；we're =we are；you're =you are；they're=they are；there're=there are；that's=that is；Sam's=Sam is。

2、含有have，has以及他們的過去式had的時候，常用縮寫式如：Weve got=we have got；You've got=you have got；they've got=they have got；she's got=she has got；he's got=he has got；it's got=it has got。

3、含有 would/ should/had l的時候，常用縮寫形式如：I'd=I would/should/had；You'd=You would/should/had；We'd=We would/should/had。

not是什么詞性的詞

not是一個否定詞，常用于表示否定、拒絕、排除等意義。

它通常放在實義動詞、情態動詞、助動詞、形容詞和副詞之前，用來否定這些詞所表達的意義。

例如：“not happy”意為“不開心”、“not possible”意為“不可能”、“do not”意為“不做”。

not后面加什么動詞

not 后面跟形容詞或動詞不定式。與no的區別是，no后面跟名詞或者動名詞。

Much of the form was not applicable to me.

表格中很多部分不適用于我。

My personal problems are not really important in the overall scheme of things.

從全局來看，我個人的問題并非十分重要。

It's  7.50, not including tax.

共計7.50英鎊，不含稅款。

She was not only intelligent but also very musical.

她不僅聰明，而且極具音樂天分。