英語，提建議的具體說法，最好全面一點

1. 用Shall we...?在表示建議或征求對方意見時，可用以Shall開頭的一般疑問句。其肯定回答一般可用：All right, OK, Good idea等。
　　
2. 用Let's...?表示“讓我們”（包括雙方在內(nèi)）做某事“這一建議時要用以Let's 開頭的祈使句。而Let us在表示讓我們做某事時，不包括對方在內(nèi)。如：Let's go and see the pandas. Let us go, will you?讓我們?nèi)グ?，好嗎?br/>　　
3. 用Why not...?Why not...?意思是：為什么不……？后接不帶to的不定式（即動詞原形）。Why not...?是省略了主語的省略形式，完整句Why don't you/they/we...?如：Why don't you go with me? Why don't you try again?=Why not try again?
　　
4. 用What about...?意為“……怎么”后可接名詞、的代詞和動名詞。如：What about going out for a walk? I'm going to the park.What about you?
　　
5. 用had better 意為“最好”，“還是……好”，常用于口語，后接動詞原形。如：You had better stay at home. You'd better go now.
　　
6. 用Don't...來表示建議，通常用于祈使句的否定形式中。如：Don't play in the street. Don't throw it like that.
　　
7. Would you like+短語？這個句型意思是“……怎么樣？”后接sth. 或to do sth.如：Would you like another cup of tea? Would you like some colour pencils?
　　
8. Will you please+動詞原形……？它的意思是“請你……好嗎？”如：Will you please come tomorrow? Will you please pick it up?

why not、why don‘t you