高中外研版 (2019)Unit 1 Food for thought精品课件ppt

这是一份高中外研版 (2019)Unit 1 Food for thought精品课件ppt，共17页。PPT课件主要包含了Lead-in， 情态动词的定义，情感 态度，动词原形， 情态动词的选择，真题链接，课堂小练等内容，欢迎下载使用。

1.T knw sme mdal verbs2.T learn hw t use mdal verbs
你都学过哪些情态动词呢？
1. Yu needn’t try it if yu dn’t want t.2. The man can speak tw freign languages.3. The pr by had t face the prblem bravely.
情态动词_______独立作谓语，只能和_________一起构成谓语，具有助动词功能。
情态动词 (Mdal verb)
1. 部分情态动词有时态变化（一般现在时/一般过去时）；2. 情态动词无人称数的变化，除be able t, have t以外；
Grammar 1 can/culd的用法
1．表示能力，“能够...” Can yu lift this heavy bx?
4. 表示某人/某物一时的特征，“有时会，时而可能...”She can/culd be tactless smetimes. 她有时太笨拙了。
2. 表示请求建议，用culd比can语气更委婉 ，回答用原形。Culd yu please wait me a mment, Jenny? Yes, I can.
3. 表示猜测或惊诧。Hw can/culd yu be here? 你怎么会在这儿？She culdn't/can't be s stupid t d that. 她不可能蠢到去做那种事吧。
Grammar 1 can/culd和be able t的区别
(1) be able t 强调通过努力而获得的能力，而can则强调自身已具有的能力。 She can sing the sng in English. 她能用英语唱这首歌。 He will be able t sing this sng in English in a few minutes, t. 几小时之后，他也能用英语唱这首歌。
(2) be able t 强调一种结果，而can只强调一种可能。 Luckily, he was able t escape frm the big fire in the end. 幸运的是，他终于逃出了大火。 If he gt here a few hurs earlier, I culd save him. 要是他早几小时来，我还能救他。
1. (2019 •北京卷改编) Meanwhile, with her parents' help, Mre is generally able _____________ (live) a nrmal teenage life.2.(北京巻) Samuel, the tallest by in ur class, ______easily reach the bks n the tp shelf.A. mustB. shuldC. canD. need
Grammar 2 must和have t的用法
1．表示必须(主观)，mustn’t表示禁止。 We must try ur best t fight fr freedm. Yu mustn’t smke here.
表示客观上的需要，强调被迫性，“不得不”。dn’t have t 表示“不必”。 Yu have t be back befre 10 ’clck because the train leaves at 10:05. Yu dn’t have t knck, just walk in.
2. 表示推测，“准是，一定是”(只用于肯定句)。 She must be tired after such a lng walk.
Grammar 2 must和have t的区别
1. (2019 • 全国卷Ⅱ改编) I wrk nt because I have t_____________ (wrk) , but because I want t.2. (重庆卷)Yu______be Carl. Yu haven't changed a bit after all these years. A. mustB. canC. willD. shall3. (辽宁卷) Harry is feeling uncmfrtable. He ______ t much at the party last night. A. culd drinkB. shuld drink C. wuld have drunkD. must have drunk4. (重庆卷) -I spent tw weeks in Lndn last summer. -Then yu must have visited the British Museum during yur stay, ______ yu? A. mustn't B. haven't C. didn'tD. hadn't
Grammar 3 need的用法
1．表示必要性(常用疑问句、否定句中)，needn’t表示不必。 This is a free service, yu needn’t pay fr it. -Need I hand in the paper nw? -Yes, yu must./ N, yu needn’t.
2. 表示需要，通常为“need t d sth”结构或“need+n” 。 Lily needs mre mney t pay fr that bk. (时态变化) Lily needed mre mney t pay fr that bk at that time. (人称数的变化) Lily desn’t need any mre mney t pay fr that bk. (否定，添加助动词)
Grammar 3 dare的用法
1．表示敢，胆敢(用于疑问句、否定句中)。 Hw dare she d things like that t me? -Dare yu catch the muse? -N, I daren’t.
2. 表示敢于，通常为“dare t d sth” (有人称与时态的变化)。 She dares t g alne. She desn’t dare t g alne. She didn’t dare t g alne.
(天津卷) My rm is a mess, but I_________ clean it befre I g ut tnight. I can d it in the mrning.A. daren'tB. shuldn'tC. needn't D. musn't
1. Tm likes his jb because he ______ enjy the beauty f nature. A. can B. must C. shuld D. be suppsed t2. Nwadays, all passengers _____ g thrugh safty check befre take a train. A. can B. may C. must D. will3. Hw _____ this be real? I _____ be dreaming A. must; canB. must; have t C. culd; must D. culd; need t
can, dare, must, need, have t
1.It is raining hard and I 　　　　　stay at hme. 2.He is taller than yu and he　　　reach the apples n the tree. 3.My friend tells me that he　　　　　 nt try spicy fd. 4.As students,we　　　　　 wrk hard at ur lessns. 5.The railway statin is very near.Yu　　　　　 nt take a taxi.