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?
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。