张先生家中有事，不能来，英文怎么说？

Mr. Zhang can't come here because of his private affairs.

Mr Zhang can't come because of something at home.

Mr. Zhang cannot come because he is busy at home.

Sorry,Mr.Zhang has some private affairs to deal with,so today he will be absent.

Mr. Zhang's in home occupies, can't come

张先生家中有事，不能来
Mr Zhang can't come because of his private affairs