--Have you finished doing your homework?--yes,I have.I__(finish)doing it tow hours ago.

问题描述:

--Have you finished doing your homework?--yes,I have.I__(finish)doing it tow hours ago.

finished
two hours ago 2个小时前,用一般过去时,结构:主语+过去式 ( finish - finished )
不明白的再问哟,请及时采纳,多谢!