I find it interesting to learn English.
2. 形式主语:
1) It + be + adj. + (for/of sb.) + to do sth.
It is kind of you to help me when I am introuble. It is important for you to learn English in youruniversity.2) It takes/took sb. + 一段时间 + to do sth.
It takes me ten minutes to finish the task.