didn't和doesn't的区别：时态不同、用法不同、侧重点不同。didn't是过去时时态，是did not 的常用口语形式；doesn't是do的第三人称单数否定形式，其后要跟原形动词，只用于第三人称否定句子中。
didn't和doesn't的区别有哪些
didn't 是对任何人称过去时的否定 比如：He didn't like it .就是说他以前不喜欢它.You didn't dofinish your homewok .你之前没有完成你的作业.
doesn't是对第三人称现在时的否定,也可以是对喜好,习惯的否定 比如：She doesn‘t like walk
可以是说她现在不喜欢不行 也可是说她一直都不喜欢步行.
doesn't相关短语
It doesn't make sense 这没有意义，不合常理
It doesn't matter 不要紧,没关系
it doesn't matter 这事儿无关紧要
doesn't make sense 行不通
It doesn't matter to me 我无所谓
It doesn't matter. 没关系。
No, he doesn't have 不,他没有
it doesn't hurt to ……也无妨，做某事有利
But he doesn't have a radio yet 可是他还没有收音机
She doesn't have your book either 她也没有拿你的书