so...that

so...that
太……以至于……（一般表示结果）
He has so few friends that his life is lonely.
他的朋友很少，因此他的生活非常孤单。
The bag is so light that a child can lift it.
这个包很轻，以至于一个孩子也能提起它。
The weather is so cold that they had to stay at home.
天气如此冷，以至于他们不得不呆在家里。
The coat is so expensive that I don't want to buy it.
这件外套太贵，我不想买。
He was so sad that he began to cry.
他悲伤得哭了起来。
He was so ill that he couldn't go to school today．
他病得很厉害，今天无法上学。

详解：

1 so that引导目的状语从句时，表示“以便；为了”，从句中常使用can /could /may /might /will /would /should等情态动词或助动词；
I raised my voice so that I can make myself heard.
我提高了声音，以便让大家都能听到我的话。
He unlocked the bike so that he can use it at any time.
他没有锁车,为的是随时都能用.
I put on a red coat so that he could see me easily.
我穿了一件红外套以便他能很容易地看见我。
引导结果状语从句时，从句中一般不用can和may等词，在so that前可以用逗号，意思是“因此;所以”。如：
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。
2 so ... that ..so＋形容词或副词＋that ...引导结果状语从句。意思是“如此……以致于……”。如：
When the football fans saw Beckham, they got so excited that they cried out.
3.such…that作“如此…以致”解，连接一个表示结果的状语从句。与so…that意思相同，但用法不同。
so…that…和such…that…都表示“如此…以致于…”，且so 后面接形容词或副词，而such后面接名词。如：
He is so good a man that we all like him.
He is such a good man that we all like him.
4. too+形容词/副词+动词不定式结构简称为too...to结构。这种结构是英语中常用的一种句型, 在大多数情况下表示否定意义

so long as<-->sooner or later