这句话的意思是“你真好”。在of you的后面,可以接一个
动词不定式。这个动词不定式是真正的主语。
of you to do sth这种形式叫做不定式的复合结构,of后面的名词或代词,是动词不定式的逻辑主语,前面的形容词大多是表示主语本身的特征、品质的,如good、bad、cruel、nice等,如:
It is nice of you to say so.
It was very kind of you to help us.
I consider it too careless of you to lose the watch.
It was very generous of Dad to give us more pocket money.
希望我能帮助你解疑释惑。