资源看点：覆盖整个单元的语法知识和所有知识点剖析与解读，言简意赅，清晰明了，拓展延伸适当，适用于自学和教学，是整理好的笔记，也是最佳的授课辅助资料。

本单元语法知识：表示建议的常见句型；
1）Why don’t you /we do sth.?　         Why don't you / we go for a walk? 　　　　 　
2) Why not do sth.?               Why not go for a walk?  　　　　
3) Shall we /I do sth.?           Shall we go for a walk?
4) Let’s do sth.              Let’s go for a walk.
5) You’d better (not)do sth.        You’d better go for a walk.
6) Could/Would/Will you please do sth.?    Could/Would/Will you please go for a walk?
7) Would you like to do sth.?      Would you like to go for a walk?
8) It’s best/better to do sth.     It’s best/better to go for a walk.
9) How/What about doing sth.?       How/What about going for a walk?