I'm really sad you don't approve of my lifestyle这是什么从句?省略了什么关联词?

I'm really sad you don't approve of my lifestyle这是什么从句?省略了什么关联词?
I'm really sad you don't approve of my lifestyle这是什么从句?省略了什么关联词?

I'm really sad you don't approve of my lifestyle这是什么从句?省略了什么关联词?
宾语从句, sad后省略了that.

I'm really sad (that) you don't approve of my lifestyle.

这是形容词的宾语从句~ 宾语从句不仅可以做动词、介词的宾语，也可以做形容词的宾语

省略了that