so和such的区别，用法是什么

1、so
+
形容词/副词
+
that
+
从句,如：
This
story
is
so
interesting
that
I
want
to
read
it
again.（这个故事如此有趣以至我想再读一次.）
He
spoke
so
quickly
that
I
couldn't
follow
him.
（他说得如此快以至我不能跟上他.）
2、so+形容词/副词+(a/an)+(单数)复数可数名词／+that+从句,如果句中的名词是单数可数名词,其前就要用a或an,如果是复数可数名词或者,前面就不用,如：
Those
are
so
beautiful
flowers
that
every
girl
wants
to
pick
them.（那些花是如此漂亮以至那个女孩想要摘下它们.）
3、such+a/an+形容词+单数可数名词+that+从句,如：
It
is
such
an
interesting
story
that
I
want
to
read
it
again.（这是一个如此有趣的故事以至我想再读一次.）
4、such+复数可数名词/+that+从句,如：
He
showed
such
concern
that
people
took
him
to
be
a
relative.（他表现得如此关心以致于人们都把他当作亲戚了.）

so和such的用法和区别