引导结果状语从句的从属连词。

主要的有so that, so…that, such…that等。如：

I went to the lecture early so that I got a good seat. 我去听演讲去得很早, 所以找个好座位。

I had so many falls that I was black and blue all over.

我摔了许多跤，以致于全身都是青一块紫一块的。

He shut the window with such force that the glass broke. 他关窗子用力很大, 结果玻璃震破了。