Why not和Why don't都表达一种询问的口气,提建议的语气
Why not+do something,Why don't+人称+do something
例句:
Why not write it down 为什么不把它写下来呢?
Why don't you write it down 你为什么不把它写下来呢?
这二者意思相同 有时也可以互换 只是第一种是表示建议,提议 why not do sth
第二种也是提议,建议的意思 只是多了应该接受建议的人或事物 why don't sb do sth
why not eat breakfast?
why don't you eat breakfast?
Why not和Why don't都可以引导疑问句,表示一种建议的意味,它们的区别如下:
一、Why not引导一个疑问句,在这种疑问句中,Why not后面直接跟不带to的动词不定式形式,表示某种建议,如:
Why not do it right now?
Why not try again?
Why not have tea?
Why not have a cup of coffee?
二、Why don't也可以引导一个疑问句,但在Why don't的后面,需要加主语,主语之后再加动词原形,也表示某种建议,如:
Why don't you do it right now?
Why don't you try again?
Why don't you have tea?
Why don't you have a cup of coffee?