why don't和why not的區(qū)別 英語詞匯有什么區(qū)別

why don't和why not的區(qū)別：why don't結(jié)構(gòu)可以有時態(tài)的變化，比如變?yōu)檫^去why didnt，完成式why haven't等，whynot沒有時態(tài)變化。why not可以獨立成句，而why don't不可以。

why don't和why not的區(qū)別

一、用法不同

1、why not：why not直接+do something。

2、why don't：why don’t+人稱+do something。

二、句子結(jié)構(gòu)不同

1、why not：why not可以獨立成句。

2、why don't：why don't不可以獨立成句。

三、時態(tài)不同

1、why not：why not沒有時態(tài)的變化。

2、why don't：why don't結(jié)構(gòu)可以有屬時態(tài)的變化，例如變?yōu)檫^去why didn't。

why don't和why not造句

why don't

Why don't we go and see it together?

咱們?yōu)槭裁床灰黄鹑タ纯茨兀?/p>

Why don't you look in on me next time you're in town?

你下次進城順便來看看我好嗎？

Why don't you come over to England in the summer?

你為何不在夏天來英格蘭呢？

why not

Why not ask someone else?

問問別人怎么樣?

Why not go there at once?

為什么不馬上去呢?

Why not buy an iPhone XR?

怎么不買iPhone XR呢?