8.9 be interested doing/to do

　interested to do　　 對做某事感興趣，想了解某事。
　interested in doing　 對某種想法感興趣，doing 通常為想法。

I shall be interested to know what happens.
我很想知道發生了什么事。 (想了解)
I'm interested in working in Switzerland. Do you have any idea about that?
我對在瑞士工作感興趣。你想過這事嗎?　 (一種想法)