初中英语语法：so...that/such...that/so that的用法

so...that/such...that/so that

一、so... that...句型中的so是副词，常常用来修饰形容词或副词，意思是“如此……以致于……”，引导结果状语从句，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……”，引导结果状语从句，其句型结构可分以下三种：

1. such＋a(an)＋adj.＋单数可数名词＋that从句

He is such a clever boy that everybody likes him.

He was such an honest man that he was praised by the teacher.

2. such＋adj.＋复数可数名词＋that从句

They are such interesting novels that I want to read them once again.

3. such＋adj.＋不可数名词＋that从句

He has made such great progress that the teachers are pleased with him.

【注意】如果such后边的名词前由many、much、few、little等词所修饰的话，则不用such而用so。例如：

He had so many falls that he was black and blue all over. 

He had so little education that he was unfit for this job.

三、so that 意思是"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。例如：

  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.

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.

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 heavy for her to move.