大全315之迷惑

huangyikai

cc

gerryzhang

如果是省略he was，为什么要补足being呢？看到being就把这个选项排除了。不解。

-- by 会员 freshopenair (2008/9/27 23:47:00)

因为before后面跟的是被动语态，所以要补出being.

红尘道士

X did something after/before X did something =.X did something after/before doing something
X was done something after/before X was done something = X was done something after/before being done something

-- by 会员 AlienX (2008/9/28 0:36:00)

学习了