1.so用作副词时常用于形容词或其他副词之前,用于表示程度,作“这么,那么”解; 可用于表示方式,作“这样,那样”解; 可用以避免重复,常用于believe, do, say之后,作“如此,这样”解; so作“同样,也”解时,其后跟be, have, do或will, can, should等,然后再接主语; so作“当然”解时,后接there或代词主语,然后再接be, have, do或will, can, should等; so也可用于代替已经陈述的事物,尤用在接that...的动词之后。
2.“not so+adj./adv.(+as...)”表示“不(像)…这么…”; “so+adj./adv.+that...”用于表示结果; “so+adj.+a/an+n.(+as sb/sth)”可用于比较。

and so on〔forth〕
参见and条。

ever so
很,非常very
She's ever so nice!她非常好!

not so much...as
不是…而是…not one thing but rather sth else
She was not so much foolish as careless.她不是笨而是不用心。

or so
大约about
I will finish it in a day or so.我将用一天时间完成它。

so as to
为了…with the intention of doing sth
The test questions are kept secret so as to prevent cheating.考试题保密以防作弊。
I got up early so as to be in time for the train.为了赶火车，我一早就起床了。

so... as to
如此…以致in such a way as to
He was so angry as to be unable to speak.他是如此生气以至于不能说出话来。

so long as
只要as long as
You will do all right so long as you follow my advice.只要你听我的建议,你一定会做好的。

so many〔much〕
多少an unspecified number or amount
We make a charge of so much per day.我们每天收费这么多。

so much so that
到这种程度以致such an extent that
He was clever so much so that he can solve it in a few minutes.他聪明到可以在几分钟内解决它的地步。

so that
1.以便in order that
I will give you all the facts so that you can judge for yourself.我会给你所有的事实以便你可以自己判断。
2.结果,以致with the result that
Everyone lent a hand, so that the work was finished ahead of schedule.每个人都帮了忙,所以工作提前完成了。

Don't be so childish.别那么幼稚。
First, you turn the engine on so.首先,你这样开动引擎。
“Is he coming?”“I believe so.”“他来吗?”“我想他能来。”
“He's gone to school?”“She said so.”“他去学校了吗?”“她是这样说的。”
“He can play football.”“So can I.”“他会踢足球。”“我也会。”
 “He is a student.”“So am I.”“他是一个学生。”“我也是。”
“There is a bee in your tea.”“So there is.”“有一只蜜蜂在你的茶里。”“真的有一只。”
“He will go to Hongkong.”“So he will.”“他将要去香港。”“是的,他将去。”
If you say so,I will have to believe it.你如果这么说,那我就只得相信了。
I am so glad that you have come.我对你的到来感到很高兴。
It was late, so we went home.天晚了,所以我们回家了。
He was so young that he could join us.他如此年轻,以致不能加入我们。
He is not so old a age as his wife.他没他妻子年龄大。

   so, accordingly, consequently, hence, then, therefore, thereupon, thus
参见accordingly条。
so long, bye-bye, cheerio, farewell, goodbye
参见goodbye条。
so, such
so是副词,用来修饰形容词或其他副词, such是形容词,用来修饰名词(位于不定冠词a或an的前面); 在形容词+可数名词的单数短语前,既可用so,也可用such,但它们的词序不同; 如果形容词后面的名词是复数形式,一般情况下用such,不用so; no可以和such连用,而不和so连用。

so用作连词可用于表示结果,作“因此,所以”解; 也可用于表示目的,作“为了,以便”解; 还可用以引出一段话进行评比。

So what?
那又怎么样this may be true but not concerned
“He says he doesn't like you.”“So what?”“他说他不喜欢你。”“那又怎么样呢?”

The dog was hungry, so we fed it.狗饿了,所以我们喂它。
I gave you a map so you wouldn't get lost.我给你一张地图,这样你就不会迷路了。
So here we are again.那么,我们又来这里了。
So you have come back. What's your story this time?你回来了,这回你将怎么说?

［词源］＜中古英语so, swo(因此,那么,非常,这样)