When my mother came back home last night,I was still _________.

问题描述:

When my mother came back home last night,I was still _________.
A.wake B.woke C.waking D.awake
我知道选D,能解释下为什么不能选C么?
i was waking和i was awake区别

awake是形容词,醒着的,在句子成分中做表语.主系表是简单句的一种.
waking是前置定语,放在修饰词的前面.也就是放在名词前.例如 i am a waking girl.