what's -his-name 如何理解

what's -his-name 如何理解 what' s his name? What's his name? what's his last name? What's his given name? 22.---What’s his name?---His name is ________ . What's his name?用her改写 英语：What's his family name. -What’s his name?-（ ）Peter Brown. 请问what's his name?怎么样回答 根据内容补全对话 what s（）name?his name()toy ()what s her name?()name What's his dog's name?（改成同义句）