He had been up the two previous nights discovering a bug.1,had be_其他解答

He had been up the two previous nights discovering a bug.
1,had been后应该接动词的呀?
2,discovering为什么要用现在分词的形式,它做什么成分?

人气：325 ℃　时间：2020-02-06 07:09:00

解答

1. 这里的up是一个形容词,起床的,没有睡觉的意思.柯林斯高阶双解词典的解释是If you are up, you are not in bed. 句子中间had been 后面跟一个形容词,表示一直没睡.2. discovering这里是动名词短语做状语修饰主句he...