1.考点：用来引导结果状语从句
要注意区别和so that 所引导的目的状语从句的区别
2.必背例句：
The noise outside was so big that we couldnt hear what the teacher said.
外面的噪音太吵了，以至于我们都听不清老师说的话了。
Kate was so angry that she couldnt say a word.
凯蒂太生气了，以至于她都不能说话了。
The food is so bad in the school cafeteria that flies go there to lose weight.
我们学校食堂饭菜质量太差，连苍蝇都去那儿减肥了。
3.扩展：
不要受汉语思维的影响，把这里的so改成了very或too,比如上句话我们不能说：
The food is too/very bad in the school cafeteria that flies go there to lose weight.
错错错！！！