It was such a boring movie that I fell asleep while watching it.为_英语解答

It was such a boring movie that I fell asleep while watching it.
为什么while 后面接的是watching it,ing形式,而不是从句谓语watch呢?
while不是连词吗?怎么不链接从句呢?

人气：496 ℃　时间：2019-10-23 12:27:03

解答

省略了I was吧?while I was waching it.
表达正在看的时候睡着了.