All the tickets having been sold out与As all the tickets had been sold out都一个意思为什么用as

问题描述:

All the tickets having been sold out与As all the tickets had been sold out都一个意思为什么用as

后面那句话里的AS是引导从句的吧,前面或者后面肯定还有句子

尽管意思一样但是结构不同,前者是独立主格结构,而后者是一个完整的句子,是由
as引导的原因状语从句.