difficult可用作定语、表语或宾语补足语。作表语时,后面可接介词of或to引起的短语,也可接动词不定式,句子的主语是动词不定式的逻辑宾语。difficult用作表语时其后接的动词不定式不能用于被动结构。

He had a reputation for being bloody-minded and difficult.

他为人刻薄、难相处是出了名的。

I have a fair idea of how difficult things can be.

我大致了解情况会有多困难。

It would be difficult to find two men who were more dissimilar.

很难找到彼此间差异更大的人了。