1、 so....that的用法： 意为“如此......以至于.....” so用来修饰形容词或副词。 eg: The bag is so heavy that I can't carry it. （这个袋子太重了，我提不动）
2、同凶及淄靥义替换：so.....that可以和too.....to.....或者enough to do sth替换。eg：The car is so 髫潋啜缅expensive that I can't afford it. =The car is too expensive for me to buy. (这辆车太贵了，我负担不起。) eg: He is so old that he can take care of himself. =He is old enough to take care of himself. (他年龄足够大了，可以照顾自己了。) 需要注意的是：that后面加句子，to 后面加动词原形。
3、so....that, such.....that，so that的辨析(1)so....that: 意为“如此......以至于....."; so用来修饰形容词或副词。(2像粜杵泳)such.....that: 意为“如此......以至于.....”such用来修饰名词。(3)so that: 意为“为的是，以便于”,用来引导目的状语从句。eg：She was so angry that she couldn't speak. (她太生气了，以至于说不出来话了。) It was such a boring speech that i feel asleep. （那是一个如此无聊的演讲，以至于我都睡着了。） I read more books so that i can catch up with my classmates. (我读更多的书，以便能赶上我的同学。)
4、注意：如果名词前有much，many,few, little等词语修饰时，要用so而不是such.eg: She has changed so much that i can hardly recognize her. ( 她变化太大了，以至于我几乎认不出来她。）