用Let’s...?表明“使我们”（包含彼此以内）做某件事“这一提议时要用于Let’s 开始的祈使句。而Let us在表明使我们做某件事时，不包括另一方以内。如：Let’s go and see the pandas. Let us go, will you?使我们去吧，好么？ 

　　用Why not...?Why not...?意思是：为什么不……？后接没有to的不定式（即动词原形）。Why not...?是省去了主语的省去方式，详细句Why don’t you/they/we...?如：Why don’t you go with me? Why don’t you try again?=Why not try again? 

　　用What about...?意指“……如何”后可配专有名词、的代词和动名词。如：What about going out for a walk? I’m going to the park.What about you? 

　　用had better 意指“**是”，“還是……好”，常见于英语口语，后接动词原形。如：You had better stay at home. You’d better go now. 

　　用Don’t...来表明提议，一般 用以祈使句的否认方式中。如：Don’t play in the street. Don’t throw it like that. 

　　Would you like 语句？这一句式意思是“……如何？”后接sth. 或to do sth.如：Would you like another cup of tea? Would you like some colour pencils? 

　　Will you please 动词原形……？它的意思是“你要……好么？”如：Will you please come tomorrow? Will you please pick it up?