modalverb高二英语课件

对现在状态推测：must/can/could/may/might+do2，“可能”must>can/may>could/might1，2，情态动词1)must肯定句“一定”，因为地上是湿的，他一定住在附近，肯定句中，Shemay/mightnothavegonehomeyesterdayMothermaybecookinglunchnow情态动词+havedone表虚拟1，她昨天可能没回家，butIwastoobusy３，Ioftenseehimhere，needn’thavedone表过去做了不必做的事，“准是”2)can/could否定句，forthegroundiswet3，evenifhewasverybusy2，　　“本来不必……”　　Youneedn’thavehurriedTherewasplentyoftime4，4，might/could+havedone:表过去本可以做而实际未做的事“本来可以…”(may/canhavedone没这意思)eg:Hemight/couldhavegivenyoumorehelp，我经常在这儿看见他，should/oughtto+havedone，妈妈这会儿可能在做午饭，表过去应该做而实际未做；否定句中，对现在正在进行的动作的推测：must/can/could/may/might+bedoingeg:---CanhebewatchingTVnow?---Yes，hemustbewatchingTVnow---No，昨晚一定下雨了，否定句“或许”，eg:1)Ishould/oughttohavehadatalkwithher，表过去不该做的事却做了，对过去事实的推测：must/can/could/may/might+havedoneeg:Ididn’thearthetelephonejustnowImusthavebeenasleep1，疑问句；could也可用于肯定句，sohemustlivenearbyItmusthaverainedlastnight，“大概”，hecan’t/couldn’tbewatchingTVnow3，3)may/might肯定句，wouldrath，