否定式的常見縮寫形式

系動詞be、助動詞、情態動詞的否定形式一般可以縮寫成爲一種簡略的形式。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     would not—wouldn't

shall not—shan't     should not—shouldn't

do not—don't     did not—didn't

ought not—oughtn't     dare not—daren't

used not to—usedn't / didn't use to