把He is Mrs.smith's son改为复数句,

把He is Mrs.smith's son改为复数句,
把He is Mrs.smith's son改为复数句,

把He is Mrs.smith's son改为复数句,
He is Mrs.Smith's son.（改为复数句）
They are Mrs Smiths' sons.
他们是史密斯太太的儿子.
Mrs Smith也可以用单数形式,即Mrs Smith's.