I didn't see him,but i _____(hear)him ____(go)downstairs

问题描述:

I didn't see him,but i _____(hear)him ____(go)downstairs

I didn't see him, but I 【heard】 him 【go】 downstairs.
我没见到他,但是我听见他下楼了.
hear sb do sth “听到某人做了某事”