I----------just-----------(fall)asleep when I heard someone

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/05 16:44:59

I----------just-----------(fall)asleep when I heard someone knocking at the door
为什么是was falling啊,fall asleep不是短暂性动词吗?

fall asleep 表示“入睡,睡着”,这里fall 是系动词,后面接形容词asleep 作表语,
这是表示状态的,表示睡着的状态,所以这里要用过去进行时态,
表示当我听到敲门声音时,我正处于睡着的状态.
明白了吗?
再问：表示状态的不是be asleep吗
再答： fall也相当于系动词，跟be类似，后面要接形容词作表语，类似的系动词还有smell（闻起来）、sound（听起来）、look（看起来）、taste（尝起来）等。明白吗？

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