with the development of economy,there are more and more floating population all over the world

题目

with the development of economy,there are more and more floating population all over the world
开头的with 为什么不能换成as,前半句在句中做什么成分,这句话为什么不是状元从句,句法小白……

答案

with the development of 是固定搭配,是随着……的发展的意思.前半句是状语,但不是从句,只是做状语成分,是介宾短语作状语.这句话是there be 句型.