be interested in doing sth 与 be interested to do sth 的基本区别是：前者表示对做某事感兴趣，后者表示很想做某事。
▲be interested in doing sth 对(做)某事感兴趣
I’m interested in emigrating to Canada. 我对移居加拿大感兴趣。
They are interested in learning drawing. 他们对学绘画感兴趣。
▲be interested to do sth 很想做某事
I’m interested to hear your opinion. 我想听听你的意见。
I’d be interested to hear your opinion about this. 我很想听听你对这事的意见。
I shall be interested to know what happens. 我很想知道情况会怎样。