doesnt和isnt用在句中的用法

doesn't 和 isn't 是 does 和 is 的否定词（或反义词）,所以 doesn't / isn't 的用法和 does / is 一样, 也就是He/she/itdoesn't 表达动作,即 他/她/它 "做" 或“操作” 某某事,通常接动词。

例：He doesn't go sailing anymore, ever since his boating accident.译：自从出事以来，他再也不去航海了。例：He isn't a carefree person that he used to be, ever since the mishap.译：自从那次灾难以来，他并不像以前那样无忧无虑。isn't和doesn't的用法一样，都常用于否定句。在很多情况下，两者可以互换。如：But he is not reading his newspaper tonight.这里的is not可以用doesn't代替，表达的意思都是但他今晚不看报纸。词汇解析：isn't：不是的发音：英 [ˈɪznt] 美 [ˈɪznt]is not 的常用口语形式例：It isn't too difficult once you get the idea.译：你一旦弄懂了，就不太难了。doesn't：不是的；不发音：英 [ˈdʌznt] 美 [ˈdʌznt]does not 的常用口语形式例：It doesn't matter to me whether you go or not.译：你去或不去，对我都没关系。