so的几种 用法和句时
so与such都有“如此、这么、那么”的意思，可进行同义改写，但用法不同。
1. so是副词，修饰形容词和副词；而such是形容词，修饰名词。 它们后面都接单数可数名词，但词序不同。
so的词序为：so+adj.+a（an）+n.
such的词序为：such+a（an）+adj.+n.
它们可以表达同样的意思，因此它们可以进行同义改写。
so nice a coat=such a nice coat 这么漂亮的一件外套
so interesting a book=such an interesting book 那么有趣的一本书
注意：后面接复数名词或不可数名词时，只能用such，而不能用so。 例如：
例1：such beautiful flowers 这么美丽的花
例2：such clever children 如此聪明的孩子
但是，复数名词或不可数名词前有many，few，much，little修饰时，只能用so而不能用such，这是一种固定用法。 例如：
例3： so many books 这么多的书
例4： so few people 这么少的人
例5： so much money 那么多的钱
例6： so little milk 那么少的牛奶
2.和that连用时，意思基本一样，但句型结构不同。 so...that...句型结构为：
so+adj.（adv.）+that...
so+adj.+a（an）+单数名词+that...
so+many（few）+复数名词+that...
so+much（little）+不可数名词+that... 例如：
例7：This book is so interesting that I have read it three times. 这本书如此有趣，我已经看了三遍。
例8：He spoke so fast that we couldn’t understand him. 他说得太快，我们都未能听懂他的话。
例9：It was so hot a day that nobody wanted to do anything. 天气很热，谁都不想干活。
例10：There were so many people that we could hardly move on. 这么多人，我们简直无法继续往前走。
such...that...句型结构为：
such+a（an）+adj.+单数名词+that...
such+adj.+复数名词+that...
such+adj.+不可数名词+that... 例如：
例11：She is such a pretty girl that everyone likes her.她是个很可爱的小姑娘，大家都喜欢她。
例12：They are such delicious cakes that I want to eat another two. 这么可口的蛋糕，我还想再吃两块。
例13：It is such sweet milk that we all want to drink it. 这么香的牛奶，我们都想喝。
注意：由于so和such后跟单数可数名词时，可以换用，同样so...that...与such...that...也可以进行同义句改写。 如上文中：This book is so interesting that I have read it three times. 可改写成：This is such an interesting book that I have read it three times. It was so hot a day that nobody wanted to do anything.可改写成：It was such a hot day that nobody wanted to do anything.
3.so与that可以直接构成词组so that， 引导目的状语从句和结果状语从句， 表示“以便、以至”的意思。 例如：
例14： He worked hard so that he could pass the
exams.为了能通过考试，他学习很认真。（但such没有这种用法。）
分享初中英语知识
so是英语中常用的一个词，它既可以作代词，又可用作副词，在中学英语中由其引起的句式结构较多，现归纳分析如下：
一、
so作代词时，用来表示前面提到的相同的人，物，事情或情况，常构成下列句式。
1、so+be(助动词或情态动词)+主语，这一结构用来表示前面所说的情况也同样适用于另一个人或物，意为
in the same way。
The boy
died and a week later so did his
sister.
I am an English
teacher.So is my wife .
但若前面所提到的人或物是两个或两个以上的句子，并且其中既又肯定句，又有否定句；既含实意动词，又含系动词；主语既有表示人的，又有表示物的。这时应用“So it
is (was) with”的句式。
Tom
studies English well ,but he isn't good at maths.So it is with
Kate.
Wang lin is a
Chinese girl ,and China is her homeland.So it is with me.
2、so + 主语 +
动词，这一结构用来表示对上文的情况给予进一步的肯定或确认。
—It was cold
yesterday.
—So
it was.
—The students study hard.
—So they do .
—He went to
college last year .
—So I
have heard.
3、主语+动词+so，这一结构意为照前面所说的做了某事或认为，希望，恐怕上文所说的事会发生。
(1)主语+do
(does,did)+so
He said he would tell me
the news,but he did not do so .
(2)主语+hope (expect,think ,believe ,suppose
,imagine ,be afraid) +
so
—Do
you think his will come ? —Yes ,I think
so.
—Will
it be fine tomorrow?—I hope so.
注：在用这一结构来代替否定概念时，既可用so，亦可用not，在动词believe，expect，suppose，imagine，think
等的肯定形式后加not与否定形式后加so，两者在意义上没有区别。但在hope，be afraid
后代替否定概念时只能是not，而不能用so。
—Will he come here ? —No,I
suppose not .(No,I don't suppose so.)
—Will
you get the first prize? —I'm afraid not.(不说I'm not afraid
so.)
4、so也可用在if
后面，用来代替前面的内容，表示省略了一个从句。
Are you free this
afternoon ?If so ,please go shopping with me
.
You may have some difficulty in
operating the machine at first ,if so, call me at once.
二、so用作副词时，表示程度。意为“这么”，“那么”，常构成下列句式结构：
1、so + 形容词（副词）+that
,引导结果状语从句。
The book is so
interesting that we all want to read it
.
I was so busy that I
had no time to write a letter .
运用这一结构时要注意以下三点：
(1)在so...that...引起的结果状语从句中，一般不用情态动词，但可用can/could.
He ran so fast that I couldn't catch up him.
(2) 在so...that
...引起的结果状语从句中，that 可以省略。
He did so well he
was pleased by the teachers.
(3)在so ...that ...引起的结果状语从句中，为了强调，可把so
+adj (adv)提到句首，并形成部分倒装。
So excited was the
boy that he couldn't speak .
2、so +adj +a\an +n. +that
....和 so+many(much ,few ,little)+n. +that
.
He is so busy a man
that he has no time to play
.
He has so many falls
that he was black and blue all over .
3、so that .....,用来引导目的状语从句，其从句中的谓语动词常和can ,may
,might ,should等情态动词连用。
They set out early
so that they might arrive in time .
Let's
take the front seats so that we may see more clearly .
4、so as to 和so
as....to
He stood up so as
to see better
Would you
be so kind as to help me?
亲，给个好评吧