你要问的是不是此句型问题find it +adj./n, to do sth?（=find it's adj./n. to do sth）
在此句型中it是形式宾语,代替了动词不定式.这是一个常用句型,中学英语经常作为句型转换（单句复句转换）来测试.例如;
We find it interesting to chat online with friends=We find (that)it's interesting to chat online with friends.
He thinks it his duty to help others=He thinks (that) it's his duty to help others.
在这两个例句里,前者是单句,后者是复句,类似的动词还有feel, guess,believe ,consider等.
希望有助于你!