there were是什么成分?what引导什么句?what 前面怎么有 介词in?

题目

there were是什么成分?what引导什么句?what 前面怎么有 介词in?
Aunt Harriet discovered that there were piles of empty wine bottles of all shapes and sizes neatly stacked in what had once been Bessie's wardrobe.

答案

1、我们先划分一下句子成分,Aunt Harriet ：主语；discovered 是动词,所以充当谓语；则that引导的是一个宾语从句（下面简称宾从）,即 “there were piles of empty wine bottles of all shapes and sizes neatly sta...