Unit10 Youre supposed to shake hands. Section A1. In your country, what are you supposed to do when you meet someone for the first time? 在你们国家，当你第一次见到某人的时候你应该做什么？【解析】be supposed to do sth 被期望做某事,应该做.1)当主语是人时,表示劝告、建议、责任等，=should =“to be expected to do sth,You are supposed to_( arrive) on time2)当主语是物时，表示“本应；本该” The train was supposed to arrive half an hour ago.【拓展】：be supposed to 与should(1) be supposed是suppose一词的_ 语态结构。后接动词不定式，相当于_ .后
