interested 与 interesting 使用方法不同

Greatly______ , I asked him to show me how to compose a song with the computer.

请问,为何此空格需要用interested,而不可以是interesting? 两个都可以作形容词,而且这里感觉主动更适合阿?

Greatly______ , I asked him to show me how to compose a song with the computer.

请问,为何此空格需要用interested,而不可以是interesting? 两个都可以作形容词,而且这里感觉主动更适合阿?

【答】

Greatlyinterested, I asked him to show me how to compose a song with the computer.

= Because I was greatlyinterested, I asked him to show me how to compose a song with the computer. （划线部分是缘由状语从句）

【比较】He is interesting. 他非常有趣。He is interested. 他有兴趣。