too..to...和not..enough to..的用法
初中二年级too[1]..to...和not..enough_to..课堂讲解用法.doc
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too to. ; not enough toThe snake is too dangerous to hold. The boy is not brave enough to hold it .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”。
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 ’dot 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.② The girl ____________that she ___________ get on the elephant.③The elephant is so tall__ that the girl can’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。
It-is--+形容词+enough-to-和too-……to的用法
一、enough to的用法1.enough意思是“充分地，足够”，放在名词之前，形容词、副词之后。
例：他跑得不够快。
He didn’t run fast enough.没有足够的食物。
There are not enough food.【拓展】enough做名词，为“足够，充分”。
例：I have eaten enough,Thank you. 我已经吃饱了，谢谢。
2. “主语＋be动词＋形容词+enough +to do”“主语＋行为动词＋副词+enough +to do”描述一个人的品质和能力，表示“某人足够…去做某事”。
He is tall enough to reach the box. 他足够高可以够到盒子。
He runs quickly enough to win the race. 他跑足够快，赢得了比赛。
3.如果强调“……对某人来说足够……”，则把“for sb.”用在动词不定式之前。
The book is easy enough for you to read.二、too …to…的是“太……而不能……”1、“主语＋be动词＋too＋形容词+to do”“主语＋行为动词＋too＋副词+to do”，表示否定的结果。
例: He is too poor to buy a new coat. 他太穷了不能买一件新衣服。
He studies too carelessly to get high marks. 他学习太粗心了，不能得高分。
2.用“too+形容词/副词for sb. to do ”表示“对某人来说太……而不能……”This story is too difficult for me to understand. 这个故事太难，我不能理解。
3.当too前面有否定词比如never, not, nothing等时，句子表示肯定。
例：You’re never too old to learn. 活到老，学到老。
(完整word版)too...to...-与-enough...to...-与-so...that...的区别
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 braveThe 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。
too…to的三种用法
too…to的用法
too…to的用法是英语中常见的一种结构，表示“太……而不能……”。
它通常由“too”和“to”两个部分组成，其中“too”表示“太”，而“to”则表示“不能”。
这种结构通常用于表示某种程度或条件已经超过了某个范围或限制，因此无法达到预期的结果或目标。
例如，“The book is too difficult to understand.”这句话的意思是“这本书太难了，看不懂。
”其中，“too difficult”表示程度已经超过了可以理解的范围，因此无法理解这本书的内容。
除了表示难度之外，too…to结构还可以用于其他场合，例如：
1.表示时间上的过度：如“He worked too hard to last.”（他工作太努力了，坚持不了多久。
）
2.表示程度上的过度：如“The soup was too salty to eat.”（这汤太咸了，吃不下。
）
3.表示数量上的过度：如“There were too many people to fit in the room.”（房间里人太多了，挤不下。
）
需要注意的是，too…to结构中的“to”后面通常接动词
原形，表示无法达到预期的结果或目标。
此外，如果句子中有否定词“not”，则可以与too…to结构连用，表示“太……而不能不……”。
例如：“The movie was not too boring to watch.”（这部电影不太无聊，值得一看。
）。
句型too..to…-not-adj.-enough-to-do….-so-adj-that+从句-及习题
too..to…/ not adj. enough to do…./ so adj that+从句too+adj. +to do sth. 太…以致不能…eg. He is too young to go to school alone.（not ）+adj/adv.+enough to do …（不）足够…去做某事…Eg. He is not old enough to go to school.He is old enough to go to school.He didn’t run fast enough to catch up with the bus.So+ adj /adv. +that+从句如此…以致…Eg. He is so young that he can’t go to school alone.He ran so fast that no one can catch up with him.1.他年纪太小了，所以不会读也不会写。
He is ______ young _______ he can _______ read _________ write.2.他跑得很快，我们跟不上他He ran so fast that we couldn’t _______ _______ _______ him3.这孩子还没到上学的年龄The child is _______ young _______ go to school.4.他很累，以致上课时他在桌子上睡着了。
He was _______ _______ _______ he fell asleep at the desk in class.5.虽然这些书很重，但汤姆足够壮可以搬运他们。
Although these books are heavy, Tom is them.6.她跑得那么慢，所以她不能赶上我们。
She ran________ ________ that she ________ ________ up with us.7.从化的空气是那么清新，因此很适合我们居住。
同样的too…to…结构,不同样的含义和用法
同样的too…to…结构，不同样的含义“too＋形容词/副词＋动词不定式”结构简称为“too...to…”结构，是初中英语中一个十分重要的结构，同时也是中考英语考查的一个十分重要的考点，同学们在学习或复习时应注意以下几点：一、too…to…结构表示否定含义表示否定意义，在翻译时，通常可译为“太……而不能……”、“太……无法……”。
常用的句型有五种。
1.“主语（人）+谓语动词+too＋形容词/副词＋to do sth.”这个句型是too...to 结构最基本的常用句型。
主语是动词不定式的执行者，too后接形容词或副词原级，有时too后也可跟一个起形容词作用的过去分词，to后接动词原形。
如：The boy is too young to go to school.这男孩年龄太小，不能上学。
He walks too slowly to get there on time.他走得太慢，不能按时到达那儿。
2．“主语（物）+谓语动词+too＋形容词/副词+ to do”这个句型也是too...to 结构最基本的常用句型。
主语是动词不定式的承受者，此时用主动式表示被动涵义。
在这个句型中，句子的主语和不定式的宾语是指同一个事物，则宾语不能重复，必须省掉。
如：The hat is too large to wear.这帽子太大，没法戴。
The tea is too hot to drink.茶太热，不能喝3．“主语（物）+谓语动词+too＋形容词/副词+ to be done”，这是“too...to”结构中主语是不定式动作的承受者，动词不定式用被动式，后不能带宾语。
如：The tea is too hot to be drunk.茶太热，不能喝。
The shoes are too badly broken to be mended.这些鞋子破烂得不能修补。
4．当句子的主语与动词不定式的逻辑主语不一样时，要用句型“主语+谓语动词+too＋形容词/副词＋for sb +to do”，在这个句型中，句子主语和不定式的宾语是指同一个事物，则宾语不能重复，必须省掉。
It is +形容词+enough to 和too ……to的用法资料
一、enough to的用法1.enough意思是“充分地，足够”，放在名词之前，形容词、副词之后。
例：他跑得不够快。
He didn’t run fast enough.没有足够的食物。
There are not enough food.【拓展】enough也可以做名词，可以解释为“足够，充分”例：I have eaten enough, Thank you. 我已经吃饱了，谢谢。
2.我们可以用“形容词+enough +to do”的结构来描述一个人的品质和能力。
例：He is tall enough to reach the top of the fridge. 他足够高可以够到冰箱顶上。
He is strong. He can lift it. He is strong enough to lift it. 他强壮地可以举起它。
3.这个结构可以用so ……that……(如此……以至于……）代替，that后面加从句He is so strong that he can lift it. 他是如此强壮以至于可以把它举起来。
4.还可以用“形容词+enough for sb. to do ”这个结构表示“……对某人来说足够……”例：这本书很容易，你能够看懂。
The book is easy enough for you to read.练习：( ) 1.I have ____________ to tell you.A.something enough interesting C.something interesting enoughB.interesting something enough D.enough something interesting( )2. He ran and ran, but he couldn’t run _____________ to catch the bus.A.fast enough B,enough quickly C.enough fast D.enough quickly( )3. Mike is twenty years old, he is _______________ drive a car.A.old enough going to C.enough old to go toB.old enough to go to D.enough old to going我的弟弟已经足够大去上学了。
中考英语复习too…to_enough… to_so…that的用法
too…to/enough… to/so…that的用法一．too…to/enough… to/so… that的结构。
1.sb+be+too+adj +to do sth. 某人太……而不能……。
Eg:He is too tired to walk.2.sth+be+too+adj+for sb+to do sth.某物对于某人来说太……而不能……。
Eg:The box is too heavy for the little boy to carry.3.sb+be+adj+enough+to do sth.某人足够……去做某事。
Eg:He is tall enough to reach the apple on the tree .4.sth+be+adj+enough+for sb+to do sth.对于某人来说某物足够……去做……。
Eg:The house is not big enough for us to live in .5.主语+谓语+so+ adj +that+从句。
…是如此的…,以至于……。
Eg:The water is so dirty that we can’t drink it .二．too…to/enough… to/so… that之间的转换。
1.so…that和too…to转换的条件。
①that引导的从句为否定形式。
②从句的主语与主句的主语相同。
Eg: He is so young that he can’t go to school.= He is too young to go to school.2.so…that和 too…for sb…to转换的条件。
①that引导的从句为否定形式。
②从句的主语与主句的主语不相同。
Eg:The box is so heavy that the little boy can’t carry it.=The box too heavy for the little boy to carry.3.so…that和enough…to转换的条件。
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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 d o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
1.My brother was so clever that he could work out the problem. (改为同
义句)
My brother __________________________ work out the problem. 2.The box isn’t light enough for him to carry. (改为同义句)
The box ________________________ for him ________ carry.
3.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.
4.The water was so dirty. We can’t drink it. (改为同义句)
The water was too __________________________________ .
5.The water in this river is very dirty. Fishes can’t live in it.
The water in this river is ____________ that fishes ___________ in it.
6.My brother got up late yesterday. He was late for school.
My brother got up ________ that。