分类：教育/科学-外语学习
问题：语法:sothat与suchthat为什么sothat表目的性状 
为什么so that表目的性状语从句而sh that表结果性状语从句?
回答：so that 有时也表结果性状语，比如
The weather turned bad quickly ,which we had not excepted before,so that we had to cancel the picnic.
语法规则是语言的游戏规则，无需问为什么。
人家怎么说，你就怎么说即可：所谓人云亦云者也。