请详细分析下这个句子的句子成分
问题描述：
请详细分析下这个句子的句子成分
Although I didn't know what that meant because school had always been easy for me.
Although，what that，because 各引导什么从句？请问你是怎样看出来的？
答
although引导让步状语从句 what引导宾语从句 that在这里是指代之前的一个事物,有实际意义,不引导任何从句,because引导原因状语从句.