情态动词和虚拟语气情态动词和虚拟语气PART 02情态动词一.表能力can,beableto1.表现在的能力2.表将来的能力:willbeableto3.表过去的能力canam/isareabletocould表示过去的能力,不表示是否做was/wereableto表示过去有能力做并且成功地做了(相当于:managedtodosth/succeedindoingsth)couldhavedone表示过去本来能够做,但是却未做PART 02情态动词一.表能力1.Icantpromiseanything,butIlldowhatI_.2.Ifyouhaveagoodsleep,you_workoutthisproblem.3.Thefirespreadthroughthehotelveryquicklybuteveryone_getout.4.I_outtheproblem,butIwastoonervous.canwasabletowillbeabletocouldhaveworkedPART 02情态动词二.表推测1.在肯定句中表推测(must/havetooughtto/should