请问在英语中提建议用Why don't you ```时末位应该用句号还是问号?

请问在英语中提建议用Why don't you ```时末位应该用句号还是问号? 用英语提建议的方式句型例如说 why don't you...how about...what about...why not...除了这些,还有什么句型 造10以上有关提建议的英语句子最好用到why not 或者why don't you 造几个有关提建议的英语句子最好用到why not 或者why don't you 请问,用于提出建议的有哪些句型?提出建议,除了用how about doning.why don't you .之外,还能用些什么? why don't you go to bed?用英语怎么说 why don't ,why not & why not do 答题的时候用在什么情况? why don't ,why not & why not do 答题的时候用在什么情况? 初三英语提建议作文就是提建议的一些句型,比如说：Why don't you.you'd better do...It's a good way to ...那个,一个小时之内,介个还不是很难对吧~ 表示意见或建议的几个短语类似why not / why don't you 这类的 Be afraid of speaking English in public. 给个建议.用why don‘t you ,why not,或 you’d better why don't you why not与why don't怎么用?怎么区别 what subjects are you good at?why? what subjects don't you like?why?用英语回答谢谢 Why don't you go to school?(因为我生病了,用英语怎么说? 你为什么不喜欢历史?用英语怎么说Why you don't like 可以不呢 为什么不去散步用英语怎么说 Why don' t you( 为什么不去游泳?用英语怎么说Why don`t you ___ ___?