He left home as a young man and (not see) since then 怎么变时态,_英语解答

He left home as a young man and (not see) since then 怎么变时态,

人气：272 ℃　时间：2020-03-27 09:19:38

解答

hasn't been seen
年轻时他就离开了家,自从那时起就再也没人见到他.