主讲教师：王克平情态动词Ifyouwanttocrossastreet,youmustwaitforthegreenlight.Youmustntcrossinfrontofthetraffic.Ifthelightisyellow,youshouldwait.Ifyouarenotcareful,acarmayhityou.IfyouareintheUK,youhavetodriveontheleft.andfindout 情态动词, 顾名思义是用来表达感情和态度的动词。 表明说话人的立场和口气, 以及说话想达到的目的 常用的情态动词有：can(could),may(might),must,haveto,need,oughtto,shall,should表能力表推测表请求、允许2013济南-_I help you, sir? -Yes, I want a T-shirt.A Can B Should C Must D Would （2010年北京）- you turn down your radio, please?-Yes, I can.A. May B. Need C. Must
