why don't you和why not的区别有哪些

两个句子结构不同：why don't +主语+动词；why not一定要直接跟动词，动词前不能有其他成分；why don't 结构可以有时态的变化，比如变为过去why didn't，完成式 why haven't 等，why not没有时态变化。

why don't you和why not的区别

这两个句式,在表达"建议"时,是一样的意思.既"(你)为什么不做.....?",或"(你)应该做.....".如：

1、Why don't you turn to the reference book?

2、Why not turn to the reference book?

"(你)为什么不看参考书呢?"也就是"你应该看一下参考书".

但是Why don't you do还可以作为一个疑问句使用,提出疑问.如：

Why didn't you see the football match?

"你为什么没有看这场足球赛?"

时态不同

1、why don't 结构可以有时态的变化，比如变为过去why didn't，完成时 why haven't 等。

2、why not没有时态变化，都是一般现在时。

侧重点不同

1、why not可以独立成句，而why don't不可以。

2、why not和Why don't都可以引导疑问句，表示一种建议的意思，例如：

Why not try again?=Why don't you try again?

你为什么不再试一试呢?

why not例句及翻译

1. Do not always say that their old, out of mind the old, white-haired then why not?

不要总说自己老了，心不老，白发苍苍又何妨?

2. If white lies can make things go smoother, why not tell them to the person you care about most?

如果善意的谎言能让事情进行的更顺利，那对自己最关心的人说说又何妨?

3. Why not cooperate with it instead of avoiding relationships or continuing to pursue the phantom of an ideal partner as an answer to your problems or a means of felling fulfilled?

何妨和关系合作?而不是回避它，或继续追逐那个理想伴侣的幽灵，做为你的问题或成就感的解药。