情态动词表推测

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,情态动词表推测,1,can,may,must,表示,推测,时用法,一定,cant,不可能,可能吗,可能,may not,可能不,一：基本用法区别,2,1,，对现在正在进行动作推测：,must + be doing,一定在做,can/could + be doing?,可能在做,吗？,can/could not + be doing,不可能在做,may/might (not) + be doing,也许在,/,不做,疑问句只用,can/could,开头,二、表示推测时的时态,3,情态动词对过去的推测,情态动词,+ have done,must have done,过去一定做过,can/could have done?,可能做了吗？,can/could not have done,不可能做了,may/might (not) have done,也许做了,/,没做,4,情态动词对过去进行的推测,情态动词,+have been doing,他说当时某人一定在洗手间监视我们。,He said someone,must have been spying,on us in the washroom .,Why I couldnt get you on the phone this morning?,We,must have been playing,tennis when you called me.,5,Exercise:,1,我的书不见了，谁有可能拿走了？,My book is gone, Who _ it away?,2,我们最好快点。老师一定在等我们。,Wed better hurry up, our teacher _ for us.,3,李先生上周出国了，所以你不可能在昨天的会议上看到他。,Mr Li went abroad last week, so you _ him at the meeting,4,这个咖啡很甜，你一定在里面加了许多糖。,This cake is very sweet. You _ a lot of sugar in it.,5,现在六点了，他可能已经回来。,Its six now, He,might have come,back,could have taken,must be waiting,couldnt have seen,must have put,6,