情态动词大全.ppt

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1、情态动词ModalVerbs1情态动词有哪些?can/may/must/will/shall/should/oughttoneed/darehadbetter/wouldrather,usedto/haveto/beableto2情态动词的含义序号原形过去式主要含义1cancould2maymight3mustmusthadto4needneeded5daredared6willwould7shallshould1.能力2.请求/准许3.可能性1.请求/准许2.可能性*3.祝愿1.义务(必须);2.猜测(肯定)需要敢

2、愿意1.征求意见2“应该”(should)3序号原形过去式主要用法8beabletowas/wereableto9havetohadto10oughttooughtto11usedto12hadbetter13wouldrather“能够”（能力）“不得不/必须”“应该”“过去（常常）”“最好”“宁愿”情态动词的含义4情态动词的结构*后接动词原形,与动词原形一起构成复合谓语*情态动词无人称和数的变化WecanspeakEnglish.Youmustn’tsmokehere.Hedarenotspeaktoyou.Yo

3、uneedn’tgonow.Willyouhelpme？Hemightcome,butI’mnotsure.Itmusthaverainedlastnight.Itshouldhavebeendoneyesterday.“能够”(能力)“不准”(禁止)“不敢”“不必”“愿意”(请求)“可能”(推测)“肯定”(推测)“应该”(责备)5情态动词在使用中应特别注意的问题过去式并不一定表示过去：can//could;may//mightCouldyoucomeearliertomorrow?(请求)Shemightberig

4、ht.(推测)MayI//we…..问句的回答：--Might/MayIwatchTVnow?--Yes,youcan/may.(或：Yes,pleasedo.)--May/MightItakethisbookoutoftheroom?--No,youcan’t/mustn’t.(或：No,you’dbetternot.)3.MustI//we//he…问句的否定回答：No,….needn’t//don’thaveto*mustn’t的含义：表“禁止”“不允许”64.情态动词表推测时应注意的几个问题:1)完全否定推测

5、用can’tbe（“不可能”）:肯定推测用mustbe（“肯定，一定”）Hecan’tbePeter.Peterhasgoneabroad.2)疑问句中的推测用can…be:CanitbeTomwhodidit?3)mustbedoing:对正在发生的动作的肯定推测：Itiseighto’clock.HemustbewatchingTVnow.4)musthavedone:对已发生的动作的肯定推测：Itiswetoutside.Itmusthaverainedlastnight.71.-----Whoiscrying

6、?-----It________beTom.He’sjustlostthegame.2.----Whoiscrying?____itbeTom?----No,it_______behim.Ijustheardhimsinginginthestreet.3.Heisblackandblueallover.Hisfather_________________(beat)him.4.Thetrainstartedanhourago.Nowit_________________(travel)onthegreatplain.

7、mustCancan’tmusthavebeatenmustbetravelling85.情态动词must表推测时的反意问句的构成：要根据陈述部分(must)后的内容来确定：Hemustbetirednow,_______________?Youmusthaveseenthefilm,____________?Itmusthaverainedheavilylastnight,__________?Theymustbewaitingforusnow,_____________?isn’the?haven’tyoudid

8、n’titaren’tthey96.情态动词+havedone时有表示责备的含义：should/oughttohavedone(本该做而实际上没做）shouldn’t/oughtn’thavedone(本不该做而实际做了）couldhavedone（本可以做成而实际上没）needn’thavedone（本不必做而实际上却做了）1)Whyarey