4、ofthingscanstudentsdoatschooltoprotecttheenvironment?Theycancollectwastepaperandsoftdrinkcans.（录音）9编辑课件MayCouldIaskyouafewquestions?答语：SureCertainlyOfcourse10编辑课件2Mymainjobistohelpspread……be +动词不定式（即be + to do sth.）的用法：1.表示按计划或安排要做的事。例如：你什么时候回家？When are you to leave for home?她将于
5、下个月结婚。She is to be married next month.女王将于一周后访问日本。The Queen is to visit Japan in a week’stime.11编辑课件both两个都放于be动词情态动词之后实意动词之前eg：Wearebothstudents.She can both dance and sing.Theybothgotoschoolbybike.含both的句子变为否定时，是将both改为neither。如：肯定句(两个男孩都聪明)Both of the boys are clever.否定句(两个男孩都不聪
6、明)。Neither of the boys are clever.12编辑课件4Encouragesbtodosth鼓励(某人)去做(某事)I encouraged her to work hard and to try for the examination.我鼓励她用功并为这次考试做努力。Teachers often encouragestudentstostudyhard.13编辑课件be supposed to主语是人，表示“应该 做某事、被期望做某事”，例如：如果你要离开教室，应该先问一问我们的老师。You are supposed to ask
7、 our teacher if you want to leave the classroom.主语是物，表示“本该、本应”，短语经常用来表示某事物本应该发生而没有发生。例如：这个会议本应该在星期二举行，但我们不得不把他推迟了The meeting was supposed to take place on Tuesday, but we have to put it off.14编辑课件在否定句中用be not supposed to do something表示“不应该做某事”，表示命令和禁止。例如：你不应该在课堂上大声交谈。You are not su
