Unit 3 Teenage problems
Grammar (2)
Why not …?Why don’t you …?What/How about …?Let’s ….Shall we …?Perhaps you should ….
How can you give suggestions politely? Discuss in groups.(P.42)
Attention
Why not …?是Why don’t you …?的省略形式，后跟动词原形。What/How about …?后跟名词、代词或动名词。Let’s ….后跟动词原形。Shall we …?后跟动词原形。Perhaps you should ….后跟动词原形。