they are known for___hard to deal with.空格处应该填什么词

They are known for (being) hard to deal with.
他们是出了名的难对付。

known for sth. / known for doing sth.

being在这里是动名词。

being

他们是出了名的难以对付。

being 引导形容词，便带了名词的性质（一种品质）可以接在be known for后面