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《【5A文】情态动词.ppt》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、情态动词总结及练习情态动词没有人称和数的变化2.情态动词有实际意义3.接动词原形（通常不带to）疑问和否定都在情态动词上变化接to的情态动词：usedtohavetobeabletooughtto把握情态动词的诀窍：体会“因景生情”，“即景抒情”，和“言外之意”；掌握常见的情态动词的功能和用法；把握交际的目的和场景；符合英美人的表达习惯，切记汉语式的翻译或受个人感情色彩的影响。情态动词的基本用法：Ⅰ.cancouldbeableto1.can/could（过去式）-----能力（体力，智力和技能）eg.Hecanrunfast.2.can/
2、could(过去式)------客观可能性（理论上）eg.Thiskindofthingcanhappeneverynowandthen.3.can/could------惊讶，怀疑，不满的语气（疑问，否定和感叹句中）could语气强于caneg.Howcanyousayitlikethat?4.允许或许可（意思接近may）注：1）may表达此意，疑问句只用第一人称2）could比can更委婉，回答时用caneg.CanIhelpyou?/WhatcanIdoforyou?5.beableto有时态及人称的变化。表示“做成”。eg.Hest
3、udiedhardandwasabletopasstheexam.1.Abird______flyinthesky.2.Inolddays,fewpeople_____liveahappylife.3.How_____shebesoselfish?4.----______IhavetheTVon?----Yes,youcan./No,youcan’t5.Thoughthefirewasbig,they________putitout.can能力could可能性could惊讶，不满Could征求允许wereableto能并做成Ⅱ.maymig
4、ht:1.允许（问句中征求对方许可），might语气更委婉。注：回答：肯定----Yes,youmay(can)/Certainly/Yes,please.否定----No,youmustn’t./No,pleasedon’t.eg.----MayIuseyourcomputer?----Yes,youmay./No,pleasedon’t.2.祝愿（may置于句首，倒装）eg.Maytheforcebewithyou.3.may/mightaswelldo:不妨…eg.Ifthat’sthecase,Imayaswelltry.Ⅲ.mus
5、thaveto:must----必须（主观要求）haveto-----不得不,只好（客观的必须)（有时态及人称变化）注：回答：肯定---must否定---needn’t/don’thavetoeg.----MustIfinishtheworktonight?----Yes,youmust./No,youdon’thaveto.2.must-----偏偏，非得（多用疑问和条件句）eg.Mustyoumakesomuchnoise?1.______youpassthecollegeentranceexamination.2.It’scoldou
6、tside,you__________waitinside.3.You________playfootballonthestreet.4._______youkeepthewindowopen?5.Ifyou______know,I’lltellyoutheanswer.Maymayaswellmustn’tMustmustⅣ.shall一三人称-----征求对方的意见（may征求对方的允许）eg.ShallIcallataxiforyou?Whatshallwedothen?2.二三人称-----许诺，命令，要求，警告，威胁，决心。eg.
7、YoushalldoasIsay.（命令）Heshallbesorryforitoneday.（警告）Nothingshallstopusfromcarryingouttheplan.（决心)Ⅴ.shouldoughtto应该should----建议；责任义务（口语);oughtto----责任义务eg.Yououghttolearnhowtobepatient.2.should-----竟然（语气词，表惊讶，含责备的意味）eg.It’sstrangethattheyshouldcomesolate.3.名词性从句中的虚拟(should)+
8、veg.SherecommendedthatI(should)takesometimeoff.4.should----如果（if条件句中）eg.Ifitshouldraintom
