i find it's useful to learn English.为什么可以改成i find it useful to learn English呀?请说明理由.

问题描述:

i find it's useful to learn English.为什么可以改成i find it useful to learn English呀?请说明理由.
i find it useful to learn English.这种是什么句型?

主+谓+形式宾语+宾补+真正宾语