he left home has a young man and (notsee) since then 怎么变时态

His sister left home in 1998,and-----since.A has not been he He is a young man 怎么变复数句 Mr.Fuller was a polite young man.He left a college and foun He has left since yesterday . George is a young man.He has a very big dog and a very small 阅读理解Mike is a young man.He has a very big dog and he has a v 英语阅读理解Mike is a young man.He has a very big dog and he has a A man has got an old cat and a young cat. He likes them very The old man have ------ his relatives since he left the home 41.My brother left school in 2005,and since then he ________ 1,My brother left school in 2005 ,and since then he ( ) in B His sister left home in 1998,and has not been heard of since