l do not know the man who your father is talkingto中为什么用介词to

l do not know the man who your father is talkingto中为什么用介词to
l do not know the man who your father is talking
to中为什么用介词to

l do not know the man who your father is talkingto中为什么用介词to
to 是和定语从句中的talk 一起的
talk to （sb) 同（某人）交谈


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talk to sb，对某人说话，这句里who 是to的宾语
这句意思是我不认识你父亲正在说话的那人。