he carried the bed on to the roof of his house

问题描述:

he carried the bed on to the roof of his house
就是这句话,恩 这里面的on 是什么意思?
on 后面是不是省略了 his back 啊? 不然看不通!

on to = onto
carry onto 搬上
整句 他把床搬上屋顶.