ModalVerb情态动词情态动词表示说话人的语气和情态的动词
语气:能力、义务、建议、允诺、许可、推测
情态:情感和态度
观察下列各句,注意谓语动词形式
Hecanfinishthepaperinanhour
Wouldyoupleasepassmethedictionary
Shemaybeverybusynow
Iwillneverforgetthedayswespenttogether
Weshouldhelpeachother
情态动词的语法特征1
不能单独做谓语,即是情态动词+动词原形
例如:Icanswim
(谓语)(除oughtto“应该”和haveto“不得不”外)2
情态动词没有人称,数的变化
有些情态动词有一般式和过去式,过去式比一般式更委婉
如can-could,will-would,may-might,shall-should建议,请求,允许,能力1
Jimisn'tgoodatmaths,buthecanspeakEnglishwell
MayIhavealookatyourIphone
Wouldyouliketojoinmyfamilyfordinner
Whengoingbyplane,youshouldarriveontime
Whenyoueatfish,youmustbeverycarefulwiththebones
能力请求/允许请求建议建议情态动词语法目录一、can/could二、may/might三、will/would四、shall/should五、must1
Ican/amabletoswim
Icould/wasabletoclimbatreewhenIwasachild
Iwillbeabletoswimnextweek
Thefirespread