Dimitri at once set out to find the thief. He knew it would not prove difficult in such a small village.


请问为何后半句用prove difficult 而不是be difficult?

find the thief 这个动作本身不可以证明不困难吧, 证明这个动作难道不该由he去做吗?

prove在此是系词,difficult是表语。你查查词典就了解了。