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8B Unit 4的语法内容出现了so...that 和such...that句型，学习这两个句型时，我们应该注意些什么呢？
so (such)...that句型常用来引导结果状语从句。正确使用so和such是掌握so (such)...that句型的关键。请看so和such与其后的搭配有什么规律。
such a foolso foolish
such an old manso old a man
such beautiful flowersso many (few) flowers
such dirty water so much (little) water
不难看出，such为形容词，修饰名词或名词词组；so为副词，修饰形容词或副词。so也可以用在单数可数名词前，但不定冠词要放在形容词之后。另外，so还可以与表示数量的形容词many、much、few、little连用，形成固定搭配。现在我们来看一下so (such)...that句型的结构与转换。
一、句型結构
1. so...that
1) so＋形容词＋that从句。如：
He is so weak that he can’t walk any longer.
2) so＋副词＋that从句。如：
He wrote so quickly that he finished his work in time.
3) so＋few (many)＋可数名词＋that从句。如：
He made so many mistakes that Mr Li was angry.
4) so＋little (much)＋不可数名词＋that从句。如：
We have so little money that we can’t buy a car.
5) so＋形容词＋a (an)＋单数可数名词＋that从句。如：
He is so wise a man that we all love him.
2. such...that
1) such＋a (an)＋可数名词＋that从句。如：
It was such a good film that we all went to see it.
2) such＋复数名词＋that从句。如：
He bought such small tomatoes that his mother was unhappy.
3) such＋不可数名词＋that从句。如：
They made such rapid progress that their teacher was glad.
二、句型转换
1. so...that与such...that句型之间可以互相转换。如：
The boy is so young that he can’t go to school.
→He is such a young boy that he can’t go to school.
→He is so young a boy that he can’t go to school.
2. 如果主、从句的主语一致，so (such)...that结构可以转换成so (such)...as to do sth.结构。如：
He walked so fast that he caught the early bus.
→He walked so fast as to catch the early bus.
He is such a fool that he can’t understand me.
→He is such a fool as not to understand me.
3.在so...that结构中，如果that从句为肯定句，可以转换成enough to do sth.形式。如：
He is so clever that he learns English well.
→He is clever enough to learn English well.
在so...that结构中，如果主、从句的主语一致，而that从句为否定句时，可以转换成too...to或not＋原形容词 (副词)的反义词 enough to do sth.句型，如果主、从句的主语不一致，可在不定式前加for sb.。如：
He came to school so late that he couldn’t see me.
→He came to school too late to see me.
→He came to school not early enough to see me.
The book is so expensive that we can’t buy it.
→The book is too expensive for us to buy it.
→The book is not cheap enough for us to buy it.
[现场演练]
同义转换，每空限填一词。
1. The problem was so difficult that no one worked it out.
It was ______ ______ ______ ______ that no one worked it out.
2. This is so good a pen that I must buy it.
This is ______ ______ ______ pen that I must buy it.
3. He told us such a funny story that we all laughed.
He told us ______ ______ ______ ______ that we all laughed.
4. He is so kind that he often helps us.
He is ______ ______ ______ help us.
5. The boy is so young that he can’t help his mother.
The boy is ______ young ______ help his mother.
The boy is ______ ______ ______ help his mother.
6. He was so rude that we didn’t ask him.
He was ______ rude ______ ______ ______ ask him.
He was ______ ______ ______ ______ ______ to ask him.
7. He wrote so well that he got a prize.
He wrote so well ______ ______ get a prize.
8. They like such a little dog that they often feed it.
They like such a little dog ______ ______ they often feed it.
Keys：
1. such a difficult problem 2. such a good 3. so funny a story 4. kind enough to 5. too... to; not old enough to 6. too... for us to; not kind enough for us 7. as to 8. so that
so (such)...that句型常用来引导结果状语从句。正确使用so和such是掌握so (such)...that句型的关键。请看so和such与其后的搭配有什么规律。
such a foolso foolish
such an old manso old a man
such beautiful flowersso many (few) flowers
such dirty water so much (little) water
不难看出，such为形容词，修饰名词或名词词组；so为副词，修饰形容词或副词。so也可以用在单数可数名词前，但不定冠词要放在形容词之后。另外，so还可以与表示数量的形容词many、much、few、little连用，形成固定搭配。现在我们来看一下so (such)...that句型的结构与转换。
一、句型結构
1. so...that
1) so＋形容词＋that从句。如：
He is so weak that he can’t walk any longer.
2) so＋副词＋that从句。如：
He wrote so quickly that he finished his work in time.
3) so＋few (many)＋可数名词＋that从句。如：
He made so many mistakes that Mr Li was angry.
4) so＋little (much)＋不可数名词＋that从句。如：
We have so little money that we can’t buy a car.
5) so＋形容词＋a (an)＋单数可数名词＋that从句。如：
He is so wise a man that we all love him.
2. such...that
1) such＋a (an)＋可数名词＋that从句。如：
It was such a good film that we all went to see it.
2) such＋复数名词＋that从句。如：
He bought such small tomatoes that his mother was unhappy.
3) such＋不可数名词＋that从句。如：
They made such rapid progress that their teacher was glad.
二、句型转换
1. so...that与such...that句型之间可以互相转换。如：
The boy is so young that he can’t go to school.
→He is such a young boy that he can’t go to school.
→He is so young a boy that he can’t go to school.
2. 如果主、从句的主语一致，so (such)...that结构可以转换成so (such)...as to do sth.结构。如：
He walked so fast that he caught the early bus.
→He walked so fast as to catch the early bus.
He is such a fool that he can’t understand me.
→He is such a fool as not to understand me.
3.在so...that结构中，如果that从句为肯定句，可以转换成enough to do sth.形式。如：
He is so clever that he learns English well.
→He is clever enough to learn English well.
在so...that结构中，如果主、从句的主语一致，而that从句为否定句时，可以转换成too...to或not＋原形容词 (副词)的反义词 enough to do sth.句型，如果主、从句的主语不一致，可在不定式前加for sb.。如：
He came to school so late that he couldn’t see me.
→He came to school too late to see me.
→He came to school not early enough to see me.
The book is so expensive that we can’t buy it.
→The book is too expensive for us to buy it.
→The book is not cheap enough for us to buy it.
[现场演练]
同义转换，每空限填一词。
1. The problem was so difficult that no one worked it out.
It was ______ ______ ______ ______ that no one worked it out.
2. This is so good a pen that I must buy it.
This is ______ ______ ______ pen that I must buy it.
3. He told us such a funny story that we all laughed.
He told us ______ ______ ______ ______ that we all laughed.
4. He is so kind that he often helps us.
He is ______ ______ ______ help us.
5. The boy is so young that he can’t help his mother.
The boy is ______ young ______ help his mother.
The boy is ______ ______ ______ help his mother.
6. He was so rude that we didn’t ask him.
He was ______ rude ______ ______ ______ ask him.
He was ______ ______ ______ ______ ______ to ask him.
7. He wrote so well that he got a prize.
He wrote so well ______ ______ get a prize.
8. They like such a little dog that they often feed it.
They like such a little dog ______ ______ they often feed it.
Keys：
1. such a difficult problem 2. such a good 3. so funny a story 4. kind enough to 5. too... to; not old enough to 6. too... for us to; not kind enough for us 7. as to 8. so that