语法难点突破之二情态动词.ppt
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1、语法难点突破之二 情态动词,Modal verbs,JackI have good news for you!RoseWhat?JackThe educational department has carried out rules to reduce students too much study load.RoseReally?If so,I dont have to stay up late to do so much homework and my mom may allow me to play computer games.JackThe best thing I think is
2、 that I can have more spare time to take exercise after class.RoseSure.By the way,who is your favorite sports star?JackLiu Xiang,I should say.RoseTell me something about him.JackWell,maybe I can show you some photos.,一.We use modal verbs to talk about:,1.Ability(能力)2.Obligation(义务)3.Certainty(可能性)4.
3、Permission(允许),二.We also use modal verbs to:,5.Make requests(提出请求)6.Make suggestions(提出建议)7.Make offers(提供帮助)8.Give advice(提出意见),1.Ability(能力):,Liu Xiang can run the 110m hurdle race within 13 seconds.,can/could:,1.can 一般表示与生俱来的能力或者一种客观可能性,还可以表示请求和允许。,Learning English _ be difficult.,can,Man can not
4、 live without air.,_ I use your bike?,Can,can/could:,2.在疑问句中,用could可表示请求,语气较委婉。,_I have the television on?Yes,you _./No,you _,Could,He asks if he _ smoke here.,could,can/may,cant/Im afraid not,can/could:,3.表示惊异、怀疑、不相信的态度。(主要用在否定句、疑问句或惊叹句中),Hes such a nice person that he _ commit the crime.,cant,你怎么会
5、如此地粗心!,How can you be so careless!,Can this be true?,can/could:,4.can never/canttoo表示“无论怎样也不过分”,“越越好”。,你过马路的时候再小心也不为过。,You cant be too careful while crossing the road.,Attention:,can/be able to区别:,Edison always wondered why hens could hatch(孵)chickens while he was not able to.,Question:Are the two m
6、odal verbs interchangeable(互换)?If not,why?,can表示与生俱来的能力或一种客观可能,而be able to更加强调通过后天的学习和努力获得的能力,或者在某个客观的场合和背景下,能做到的事情。,Attention:,can/be able to区别:,A big fire broke out in ABC hotel yesterday.Luckily,everyone _ run out of the building.,was able to,2.She _ speak both English and French.,can,Im so tired
7、!I have to do the training for at least 10 hours a day!,2.Obligation(义务):,yet he must work hard to win the gold medal.,Although Liu Xiang is so gifted in hurdle race,Attention:,advisability,necessity,ought to/should,have to,must,Your mother brings you up and takes good care of you,so when she is old
8、,you _ look after her in return.,A.can B.may C.have to D.must,Shi Dongpeng might win a medal at the Olympic Games.,Although the chance of winning a medal is small,Ill try my best!,3.Certainty(可能性):,Attention:,very uncertain,almost certain,might,should,must,may,could,ought to,will,1.He _ be at home.,
9、2.He _ be at home,for he just called me from his home 15 seconds ago.,A.may B.might C.must,A.may B.might C.must,(can),must 表示肯定的猜测,译为“一定”,不能用于否定句或疑问句。This must be your pen.He must be doing his homework now.He must have arrived already.,must,must,2.表示“坚持”(常用于固定句型:if you must do sth.如果你非得要做某事),如果你真的要走
10、,那就悄悄离开。,If you must leave,do it quietly.,Attention:,They_ be doing the experiment in the lab.Why?Because the lights are still burning.,A.could B.can C.must D.would,4.Permission(允许):,May I eat KFC if I win the gold medal?,may/might:,1.表示许可。表示请求、允许时,might比may的语气更委婉一些。,Might/May I use your computer?Ye
11、s,you can./No,you cant/mustnt.,may/might:,2.用于祈使句中表示祝愿。,3.表示推测、可能(只用于肯定句,疑问句则要用can或could)。,祝你成功!,May you succeed.,He may be very busy now.,May you be happy all your life.,5.Making requests(提出要求):,Can you help me with my training?,I dont know how to use this equipment!,will can could would,informal,f
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- 语法 难点 突破 情态 动词
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