搭配 “prove difficult” 的意思是 “一件事做起来很困难”。在完成一项任务的过程中，当我们意识到事情比原本想像得要更加复杂、困难的时候，就可以使用 “something proves difficult” 这个表达。
在 “prove” 和 “difficult” 的中间也可以加表程度的修饰词语，比如：something proves more difficult than… 某件事做起来要比…更难。
“Prove difficult” 的后面也可以加不定式结构，变成 “prove difficult to do something”，用来谈论 “一件具体的事情实际做起来非常困难”。
- The business had offices in many different cities, so it proved difficult to coordinate all the teams and make sure they worked together.
- I thought this report was going to be quick and easy to write but it's proving to be more difficult than I thought.
- We think we're extremely organised and ready to move house next week, but we're sure there are still many things we haven't anticipated. It will probably prove more difficult than we realise at the moment.