why don't you和why not的區別有哪些

兩個句子結構不同：why don't +主語+動詞；why not一定要直接跟動詞，動詞前不能有其他成分；why don't 結構可以有時態的變化，比如變為過去why didn't，完成式 why haven't 等，why not沒有時態變化。

why don't you和why not的區別

這兩個句式,在表達"建議"時,是一樣的意思.既"(你)為什么不做.....?",或"(你)應該做.....".如：

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

2、Why not turn to the reference book?

"(你)為什么不看參考書呢?"也就是"你應該看一下參考書".

但是Why don't you do還可以作為一個疑問句使用,提出疑問.如：

Why didn't you see the football match?

"你為什么沒有看這場足球賽?"

時態不同

1、why don't 結構可以有時態的變化，比如變為過去why didn't，完成時 why haven't 等。

2、why not沒有時態變化，都是一般現在時。

側重點不同

1、why not可以獨立成句，而why don't不可以。

2、why not和Why don't都可以引導疑問句，表示一種建議的意思，例如：

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

你為什么不再試一試呢?

why not例句及翻譯

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

不要總說自己老了，心不老，白發蒼蒼又何妨?

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

如果善意的謊言能讓事情進行的更順利，那對自己最關心的人說說又何妨?

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?

何妨和關系合作?而不是回避它，或繼續追逐那個理想伴侶的幽靈，做為你的問題或成就感的解藥。