as soon as you can.can后面怎么没动词?

题目

as soon as you can.can后面怎么没动词?
You must ring me up as soon as you can.
你必须尽快给我打电话.
as soon as sb can
这是固定用法,情态动词can 后面怎么没动词?怎么理解
是想问，can 后面没跟实意动词，而且后面没跟 宾语》
是 固定用法？
as soon as sb can 是不是等于 as soon as possible
都是尽快的意思。

答案

后一个as引导比较状语从句,和汉语一样,比较状语从句常用省略.