比较级用法求助

问题描述:

比较级用法求助
I am taller than you are 那you后面为什么要加一个 are 这句话我感觉错了 应该是I am taller than you 求高手详解还有一句话是 THE hat is the cheapest I have seen 我怎么感觉应该是cheapest +介词+ I have seen 求高手赐教一下到底能不是加一个介词比如说of I have seen 加哪个介词

1. I am taller than you. are 不要
2. The hat is the cheapest I haveseen. 是定语从句I前面省略引导词 that
3. The hat is the cheapest one of which I haveseen. 加介词表示范围