Will you make sure of his return?怎么翻译啊?这句中为什么用return,而不是用returning?

问题描述:

Will you make sure of his return?怎么翻译啊?这句中为什么用return,而不是用returning?

Will you make sure of his return?
翻译为:你能确定他回来?
his 他的的意思,后面跟名词原型即可可是,我看有的语法书上又写his returning。这样是怎么回事啊?感谢。有时候书上不一定正确的,高中的时候老师这么说的!!