“难”造句

数学试卷和英语试卷很难。
The papers in maths and English are very testing.

他为人刻薄、难相处是出了名的。
He had a reputation for being bloody-minded and difficult.

很多父母觉得要孩子循规蹈矩是件很难的事情。
Many parents find it hard to discourage bad behaviour.