新概念四第七课有一个句子:The further off this solid obstruction, the longer time will elapse for the return of the echo.
我自己试着还原了句子的初始表达:The time for the return of the echo off this solid obstruction will elapse long.
请问我还原得对吗?如果对的话,off this solid obstruction就是echo的定语,而如果我要把the further这句省略部分补齐的话,就是 the further the echo is off the solid obstruction,那off结构就是个表语了。请问我的理解是哪里出了问题呢?