too...to...-与-enough...to...-与-so...that...的区别.doc
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too...to... 与 enough...to... 与 so...that...的区别 too+adj./adv. to+v.太...而不能做某事 例:He is too young to go to school. 他年纪太小还不能上学。 2.adj./adv.+enough to +v.足够...而能做某事 例:He is old enough to go to school. 他足够大了能上学了/他已到了上学的年龄了。 3.so +adj./adv.+that从句 如此...以致 例:He is so old that he can go to school. 通常来说,这三种句型可用于同义句转换,具体如下: too...to... =not 反义词 enough to =so...that 否定句 例:He is too young to go to school. = He is not old enough to go to school. = He is so young that he can't go to school. too …to …. ; not …enough to… Step 1 看图说话 利用课本P36页的图画和提示词练说 too…to do 和not … enough to do 句子。如:1. The snake / dangerous/ hold . / The boy not brave The snake is too dangerous to hold. The boy is not brave enough to hold it . 板书 too…to do 和not … enough to do并让学生明确这两个短语的中文意思是 “太… 而不能…”。提醒学生观察这两个句子结构中的形容词用什么形式,to do中的do 可否变换形式。在准确理解的基础上继续看图说话。 2. The girl / short / get on the elephant. / she / not / tall . 3. The elephant / heavy / carry. / The boy / not strong. 4. The elephant / fat / go through the gate. / The gate / not wide. 5. The monkey / far away / get the bananas. / The bananas / not near. 6. The cat/ slow/ catch the bird./ It / cannot run/ fast . Step 2 抛砖引玉 板书The snake is too dangerous to hold. The boy is not brave enough to hold it . (改为同义句) The snake is so dangerous that the boy _________ hold it. 学生在理解的基础上探求答案,在探求答案的过程中获得新知。 板书 so … that + 含有can’t / couldn’t do的否定句等同于too…to do…; not …enough to do 同步操练:1. The girl is too short to get on the elephant. (改为同义句) ①The girl _________________________ to get on the elephant. ②The girl ____________that she ___________ get on the elephant. ③The elephant is so tall__ that the girl can’t get on it . ④The elephant _________ enough ______ the girl ______ get on. ⑤The elephant __________tall ______ the girl _______ get on. 完成句子后求异: ①与原句比较后发现:由too… to do… 结构转换为not … enough to do 结构时,要找到句中形容词的反义词。 ③与④比较后发现:so… that + 含有can’t / couldn’t do的否定句结构的句子,若主从句的主语不一致时,改写为too… to do… 或not … enough to do …结构时, 要在不定式to do前添for sb ,若主从句的主语一致,则不须添for sb。如: He is so young that he can’t go to school. (改为同义句) He too young to go to school . He not old enough to go to school. 观察④ 、⑤ 两句可得:在too… to do… 或not … enough to do …的句子中,若to do 的宾语与句子的主语相一致时,须省略it。 发散思维:若把句子改为过去时,应该怎么办? 1. The girl was too short to get on the elephant. (改为同义句) The elephant was so tall__ that the girl couldn’t get on it . 2. He ran very fast. He couldn’t stop. He ran too fast to stop. He ran so fast that he couldn’t stop. (方法是句型转换时要注意时态一致。) Step 3 链接中考 The panda is so fat that it can’t go through the hole.(改写为同一意思的句子) The hole ________________________________ such a fat panda to go through. The ice on the lake was so thin that people couldn’t skate on it. (改写为同一意思的句子) The ice on the lake was not _______ enough _______ people ____________________. Mr. King is very busy at work. He can’t take a holiday.(改为同义句) Mr. King is ______________________ take a holiday. My grandfather is too old to travel around. (改为同义句) My grandfather is _______ old _______ he ________________ travel around any __________. Step 4 巩固练习 My brother was so clever that he could work out the problem. (改为同义句) My brother __________________________ work out the problem. The box isn’t light enough for him to carry. (改为同义句) The box ________________________ for him ________ carry. He is very short . He can’t reach the book on the shelf.(合并为一句) He is ________________________ reach the book on the shelf. The water was so dirty. We can’t drink it. (改为同义句) The water was too __________________________________ . The water in this river is very dirty. Fishes can’t live in it. The water in this river is ____________ that fishes ___________ in it. My brother got up late yesterday. He was late for school. My brother got up ________ that Practice One : 1. a. The box is so heavy that I can't carry it. b. The box is ________ heavy______ ________ ________ carry. c. The box is not ________ ________ for me to carry. 2. a. The maths problem isn't easy enough for me to work out. b. The maths problem is ________ difficult ________ I can't work it out. c. The maths problem is ____ difficult ________ ______ _____ work out. 3. a. The book is interesting enough for everybody to read. b. The book is _____ interesting________ everybody likes to read it. Practice Two: He is old enough to go to school. He is __________ __________ that __________ __________ go to school. 2. She was so weak that she couldn’t take care of her baby. She was __________ weak __________ take care of her baby. Practice Three: 1 She is so young that she can’t go to school. =She is ________ _________ ______go to school. 2 The box is so heavy that he can’t carry it. =The box is________ _________ ________ _______to carry 3 Xiao Lin is so old that he can go to school. =Xiao Lin is ______ _________ ________go to school. 4 The box is so light that he can carry it. =The box is _________ ____________ for him to carry. 5 The man is so old that he can’t go to work. =The man __________ __________ _______to go to work. 6 The desk is so heavy that I can’t move it. =The desk _________ _________ __________for me to move. 7 He is not old enough to do the work. =He is _________ _________ to do the work. 8 The problem is too difficult for me to work out. = The problem ________ ___________ ______for me to work out. Practice Four: 1. The book is interesting enough for everybody to read. The book is ____ interesting ____ everybody likes to read it. 2. The boy is so short that he can’t reach the buttons of the lift. The boy is ____ short ____ ____ the buttons of the lift. The boy isn’t ___ ____ _____ _____ the buttons of the lift. Too..to so…that enough…to 练习 He is too young to go to school. 他太年幼了以至于不能上学。 = He isn't old enough to go to school. 他的年纪还没有大到足以上学。 = He is so young that he can't go to school. 他是如此的年幼,以至于他不能上学。 1. He is old enough to go to school. He is __________ __________ that __________ __________ go to school. 2. She was so weak that she couldn’t take care of her baby. She was __________ weak __________ take care of her baby. 一、so…that与too…to的转换 当that引导的从句为否定式且从句主语与主句的主语相同时,so…that可转换为too…to结构;若从句主语与主句的主语不相同时,so…that可转换为too…for sb to结构。例如: She is so young that she can’t go to school. =She is too young to go to school. The box is so heavy that he can’t carry it. =The box is too heavy for him to carry.\ 二、so…that与enough to的转换 1. 当that引导的从句为肯定式时,若从句主语与主句主语相同时,so…that可转换为enough to结构;若从句主语与主句主语不相同时,so…that可转换为enough for sb to结构。例如: Xiao Lin is so old that he can go to school. =Xiao Lin is old enough to go to school. The box is so light that he can carry it. =The box is light enough for him to carry. 2. 当that引导的从句为否定式时,若从句主语与主句主语相同时,so…that可转换为enough to的否定结构;若从句主语与主句主语不相同时,so…that可转换为enough for sb to的否定结构。同时要注意,转换后的形容词(副词)要用其相应的反义词。例如: The man is so old that he can’t go to work. =The man isn’t young enough to go to work. The desk is so heavy that I can’t move it. =The desk isn’t light enough for me to move.\ 三、enough to的句式为否定式时,enough to可以转换为too…to结构。但转换后的too…to结构中的形容词(副词)要用其相应的反义词。例如: He is not old enough to do the work. =He is too young to do the work. The problem is too difficult for me to work out. = The problem isn’t easy enough for me to work out.改写同义句,每空一词。 1. The book is interesting enough for everybody to read. The book is ____ interesting ____ everybody likes to read it. 2. The boy is so short that he can’t reach the buttons of the lift. The boy is ____ short ____ ____ the buttons of the lift. The boy isn’t ___ ____ _____ _____ the buttons of the lift. 八年级 so...that; ....enough....;too...to专项练习 1.He is old enough to go to school. He is __________ ________ that _________ _________ go to school. 2. She was so weak that she couldn’t take care of her baby. She was __________ weak __________ take care of her baby. 3.She is so young that she can’t go to school. She is ________ ________ _________ go to school. 4.The box is so heavy that he can’t carry it. The box is ________ _________ for him_______ carry. Xiao Lin is so old that he can go to school. Xiao Lin is _______ ________ _________ go to school. 6.The box is so light that he can carry it. The box is ________ _______ for him ______ carry. 7.The man is so old that he can’t go to work. The man ________ _________ old _________ go to work. 8.The desk is so heavy that I can’t move it. The desk is ________ ________ for me ____move. He is not old enough to do the work. He is _______ ________ ________ do the work. 10.The problem is too difficult for me to work out. The problem isn’t _______ _______ _______ _____ to work out. 11. The book is interesting enough for everybody to read. The book is ________ ________ ________ everybody likes to read it. 12. The boy is so short that he can’t reach the buttons of the lift. The boy is ________ _______ _______ _______ the buttons of the lift. The boy isn’t _______ ________ ______ ______ the buttons of the lift. 13.The water was so dirty that we couldn't drink it. The water was _______ dirty for us _______ drink. 14.The child is so young that he can't put on his clothes. The child isn't _______ _______ _______ put on his clothes. 15.The problem is too difficult for me to work out. The problem isn't _______ ______ ________ for me to work out. He is so young that he can't go to school. He is ______ young ______ go to school. 17.The box is so heavy that he can't lift it. The box is _______ heavy ______ ______ _____ lift. Tom is so old that he can go to school. Tom is _______ _______ to go to school. 19. The box is so light that the child can lift it. The box is _______ ________ ________ the child to lift. so…that 、such…that、so that的用法练习题 一.用so,such填空 he was_______excited that he couldn't get sleep this teacher is_________kind that we all like him he ran____________quickly that we all couldn't catch up with him this is_____________interesting a book that we all ebjoy reading it they are__________intereting books that we all enjoy reading them he has________many books that I can't count them this is________ an interesting book that we all enjoy reading it there was ____much food that we couldn't eat it all I have___little money that I cannot afford a car he is _____a good student that we alll like him. he is ______good a student that we alll like him. it was ____bad weather that he had to stay at home. I've had ______many falls than i'm blick and blue all over 二.填空 The little boy saved every coin_________ __________he could buy his mother a present on Mother's day .当球迷们看到贝克汉姆的时候,他们如此激动以致于大喊大叫。(根据中文意思完成句子,每空一词。)(2003北京市海淀区) When the football fans saw Beckham, they got________excited_____they cried out. . David was so careless that he didn't find the mistakes in his test paper. (变为简单句)(2003福州市) David was__________careless__________find the mistakes in his test paper. A:The boy is so young that he can't look after himself. B:The boy is not______to look after himself.(改写句子,使B句与A句意思相近) . The stone is so heavy that I can't lift it up. It is__________a heavy stone__________I can't lift it up.(改写句子) The book is______ interesting______I want to read it again It was______a fine day______we couldn't wait to go out for a walk Jim is ______clever______he can work out this difficult problem easily My cousin ran______fast ______I couldn't catch up with him He left in______a hurry______he forgot to close the window They are______lovely students______the teacher like them very much Mr Zhang is______good a teacher______all the students like him Bob has______few friends______he often feels lonely 三.单项填空。 She bought a digital camera online she would save a lot of time. (2003扬州市) A.so that B.as soon as C.no matter D.such that .—___fine day it is today! —Yes,the sunshine is___beautiful that I'd like to go swimming in the sea. (2003青岛市) A. How, such B. What a, very C. How, so D. What a, so The camera is _____expensive___ I can't afford it. (2004年辽宁省) A. so, that B. such, that C. so, as to D. enough, that . Miss Gao asked a question, but it was____that nobody could answer it. A.very difficult B. too difficult C. difficult enough D. so difficult To my surprise,he could get over ____ difficult problems that he succeeded at last. A.so B.such 11 一.用so,such填空 so so so so such so such so so such so such so 二.填空 so that so,that too , to old enough such, that so...that... such...that... so...that... so...that... .such...that... .such...that... .so...that... 8.so...that... 三.单项填空。 A D D A B so...that... 如此……以致于……...so that... 以便于,为了 “so...that...”句型的意思是“如此/这么……以致于……”,常引导结果状语从句,但“so...that...”是个爱“变脸”句型,你一不留意就会出错。“so...that...”句型及其转换也是中考的热点,现将其用法总结归纳如下,让我们一起来看看它是怎样变的吧。 一、 so... that...句型中的so是副词,常常用来修饰形容词或副词,常用句型为:主语+谓语+so+adj. / adv. + that从句。例如: 1. he is so young that she can't look after herself. 2. The boy ran so fast that I couldn't catch him. 3. He was so angry that he couldn't say a word. 二、 在“such... that...”句型中,such修饰名词,意思也是“如此……以致于……”但当名词前有many、much、(a) few、(a) little等词修饰时,句子中要用“so...that...”而不能用“such...that...”。例如: 1. He has so much money that he can buy what he wanted. 2. I've had so many falls that I have pains here and there. 3. There is little water in the glass that I can't drink any more. 三、 so与that也可连起来写,即变成:... so that ...(以便 / 为了……),引导目的状语从句。例如: 1. I got up early so that I could catch the early bus. 2. Please open the window so that we can breathe fresh air. 3. You must go now so that you won't be late. 四、以“so...that”引导的结果状语从句可以转换成不定式的简单句,即可转换为“...enough to...”或“...too...to”句型,但这种转换必须符合下列条件: 1. 当主句和从句的主语一致,且that从句是肯定句时,可用“enough to do sth.”来转换。如: The man is so strong that he can lift the heavy box.→ The man is strong enough to lift the heavy box. He was so clever that he can understand what I siad. → He was clever enough to understand what I siad. 2. 当主句和从句的主语不一致,且that从句是肯定句时,可以用“enough for sb. to do sth.”来替换,但须注意不定式的宾语要省略。例如: The question is so easy that I can work it out. → The question is easy enough for me to work out. The box is so light that he can carry it. → The box is light enough for him to carry. 3. 当主句和从句的主语一致,且that从句是否定句时,可以用“too...to”来替换。例如: The girl is so young that she can't dress herself. → The girl is too young to dress herself. I was so tired that I couldn't go on with the work. → I was too tired to go on with the work. 4. 当主句和从句的主语不一致,且that从句是否定时,如果要用“too...to...”替换“so...that...”,则用介词for引出动词不定式的逻辑主语,可以用“too...for sb. to do sth.”来替换,注意不定式的宾语要省略。 The bag is so heavy that she can't move it. → The bag is too hea- 配套讲稿:
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