I can see a dog ____ (lie) on the floor(用所给单词的适当形式)

问题描述:

I can see a dog ____ (lie) on the floor(用所给单词的适当形式)

I can see a dog _lying___ (lie) on the floor 我看到一只狗正躺在地上
I can see a dog __lie__ (lie) on the floor,我看到一直曾躺在地上.
具体看上下文.