关于状语从句的省略Before you are operated on,you mustn't eat anything.可以变为Before being operated on,you mustn't eat anything.When the museum is finished,the museum will be open to the public.为什么不能变为When being finished---

英语状语从句的省略 关于状语从句的省略Before you are operated on,you mustn't eat anything.可以变为Before being operated on,you mustn't eat anything.When the museum is finished,the museum will be open to the public.为什么不能变为When being finished--- before引导的状语从句例子 比较状语从句的省略问题最好有例句. Think well before you act中before you act是状语从句? 关于主将从现好像是状语从句省略主语,成简单句,能不能讲一下用法之类的 请问,状语从句中before的用法有哪些 关于时间状语从句中 before和after的区别关于时间状语从句中 before和after,until的区别请勿抄袭网上答案（特别是百度百科）如果我能看懂我就不提问了 定语从句和状语从句的引导词何时可省略 让步状语从句中的省略用法 求三个省略状语从句RT you must do it as I I told you.as引导的方式状语从句完整吗（还是省略句）? 关于状语从句的省略问题?If you are chinese people,you should talk with someone in chinese.不是当主从句主语一致时能省略主?句的主语,谓语动词发生形式的改变.这句怎么省? 关于定语从句状语从句什么是定语从句状语从句 Check all your answers before you turn in your papers这是状语从句.怎么说呢, I'glad to see you是怎么转化为Seeing you I feel glad的是先转化成状语从句后再省略的吗,那为什么会把when给省略掉, before可以引导时间状语从句吗 when做时间状语从句时的省略when做时间状语从句时的省略,语法书上说WHEN的主语和主句一样,而且when从句的when做时间状语从句时的省略when做时间状语从句时的省略,语法书上说WHEN的主语和主句