We are glad to hear of the post office’s making a consignment of bikes.

题目

We are glad to hear of the post office’s making a consignment of bikes.
office's 是 office is 这句of 后面的话为什么直接用BE动词?这样语法不就不对了吗,of 即不是连词也不是引导词啊.为什么不用不定式?

答案

office's 不是 office is ,the post office’s 的意思是【邮局的】
又如 Li ping' news 李萍的消息