Danny_____(认为)he could hit the ball,but he hurt his hand.
问题描述：
Danny_____(认为)he could hit the ball,but he hurt his hand.
空里应填什么,写出,并说明理由.
还有：
I often help my mother _____(clean)the room.
答
thought
用think的过去式,从句意思可以看出是发生在过去的事;从hurt没用hurts也可以知道是过去时.
cleaning
help sb.(in) doing sth.