interested to do 对做某事感兴趣，想了解某事。 interested in doing 对某种想法感兴趣，doing 通常为想法。
I shall be interested to know what happens. 我很想知道发生了什么事。 (想了解) I’m interested in working in Switzerland. Do you have any idea about that? 我对在瑞士工作感兴趣。你想过这事吗? (一种想法) 8.10 mean to doing/to do
mean to do 打算、想 mean doing 意味着 I mean to go, but my father would not allow me to. 我想去，但是我父亲不肯让我去。 To raise wage means increasing purchasing power. 赠加工资意味着增加购买力。