15 find it + adj to do sth。

　　在现代社会越来越多人发现保持健康很重要。

　　In modern society more and more people find it important to keep healthy。

　　我发现学习游泳很简单。

　　I find it easy to learn swimming。

　　我发现解决这个难题很难。

　　I find it difficult to solve the problem。