such…as to do…与so…as to do句型中的动词不定式作结果状语。我们常将其译为“如此……以致……”。such后面的中心词为名词，so后面的中心词为形容词或副词。such…that…与so…that…句型中的主句主语和从句主语一致时，可分别与such…as to和so…as to…句型互换使用。例如：

He started so early that he got there two hous ahead of time.=He started so early as to get there two hours ahead of time.他出发得如此之早，结果提前两个小时赶到了那儿。

It was such a good answer that it interested everybody present.=It was such a good answer as to interest everybody present.这个回答如此之好，以致于在座的每一个人都很感兴趣。
四、注意so…that…句型与so that句型的区别

so…that…可引导结果状语从句，而so that句型可以引导结果状语从句，也可以引导目的状语从句。请比较：

He studied very hard so that he could pass the exam.他学习很努力以便能够通过这次考试。(so that引导目的状语从句)

He studied very hard,so that he passed the exam.他学习很努力，结果通过了这次考试。(so that引导结果状语从句)