2021六年级英语上册专项复习三情态动词课件人教PEP

,PEP,六年级上册,专项复习三 情态动词,1.,掌握情态动词理论,2.,会做相应的练习题,学习目标,游戏规则：,按要求每完成一项任,务即可获得相应的分数，满,10,分即可获得一张王牌，集齐,10,张王牌即可获得一次特权机会。,王牌对王牌,1.,情态动词有,can (could), may (might), must, have to, shall (should), will (would), need (needed),等。,2.,情态动词无人称和数的变化；,3.,不能单独使用，其后必须加动词原形。,I,can speak,English.,He,can speak,English.,They,can speak,English.,一、,can, could,1),表示能力（体力、知识、技能）。,eg: May can speak English.,（知识）,I can ski.,（技能）,此时可用,be able to,代替。,can,只有一般现在时和一般过去时；而,be able to,则有更多的时态。,eg: Ill not be able to come this afternoon.,当表示“经过努力才得以做成功某事”时应用,be able to,，不能用,can,。,2),表示请求和允许。,Can,I go now?,Yes, you can. / No, you cant.,此时可与,may,互换。在疑问句中还可用,could, might,代替,，,不是,过去式，只是语气更委婉，不能用于肯定句和答语中。, Could I come to see you tomorrow?,Yes, you can. ( No, Im afraid not. ),二、,may, might,1),表示请求和允许。,might,比,may,语气更委婉,而不是过去式。否定回答时可用,cant,或,mustnt,表示“不可以，禁止”。, Might/ May I smoke in this room?, No, you mustnt., May/Might I take this book out of the room?, Yes, you can. (No, you cant / mustnt. ),用,May I.,？征徇对方许可时比较正式和客气，而用,Can I.,？在口语中更常见。,2,）用于祈使句，表示祝愿。,May you succeed!,3),表示推测、可能性（不用于疑问句）。,might,不是过去式，它所表示的可能性比,may,小。,1. He may /might be very busy now.,2. Your mother may /might not know the truth.,三、,must, have to,1),表示必须、必要。,在回答引出的问句时，如果是否定的，不能用,mustnt,（禁止，不准），而用,neednt, dont have to,（不必）,.,Must we hand in our homework today?,Yes, you must.,No, you dont have to. / No, you neednt.,2) must,是说话人的主观看法， 而,have to,则强调客观需要。,must,只有一般现在时，,have to,有更多的时态形式。,1. The play isnt interesting, I really must go now.,2. I had to work when I was your age.,3),表示推测、可能性（只用于肯定的陈述句）,Your mother must be waiting for you now.,四、,shall, should,1) shall,用于第一人称，征求对方的意见。,What shall we do this afternoon?,我们今天下午应该做什么？,2) shall,用于第二、三人称，表示说话人给对方的命令、,警告、允诺或威胁。,You shall fail if you dont work hard.(,警告,),如果你不努力工作，你会失败。,五、,will, would,1 ),表示请求、建议等，,would,更委婉。,Will / Would you pass me the pen, please?,2 ),表示意志、愿望和决心。,I will never do that again.,3),表示估计和猜想。,It would be about 11 oclock when he left home.,练习：,句型转换（,10,分,每题,1,分）,1. I can,speak English,.,变为一般疑问句：,_,变为否定句：,_,对划线处提问：,_,Can you speak English?,I cant speak English.,What can you do?,2. He will go to the USA,next year.,变为一般疑问句：,_,变为否定句：,_,_,对划线处提问：,_,Will he go to the USA next year?,He will not go to the USA next year.,When will he go to the USA ?,3. We will,have an English party,this Sunday.,变为否定句：,_,对划线处提问：,_,We will not have an English party this Sunday.,What will you do this Sunday?,4.,My,friend can jump high.,变为否定句：,_,对划线处提问：,_,My friend can not jump high.,Whose friend can jump high?,