however引导的名词性从句

1、However you look at it， it's going to cost a lot.不管你怎么看，它都要花很多钱。

2、She has the window open， however cold it is outside.不管外面多冷她都开着窗户。

3、However much you try to dress it up， office work is not glamorous.无论你怎样夸饰，办公室工作都不令人向往。

Howerver difficult a problem it is can be solved.不管多难的问题，都可以得到解决

这个例句是however引导名词性从句中的主语从句，However difficult a problem it is是主语， can be solved是谓语