it is fun to do 还是 doing?it is no use doing 还是 to do划一下句子成分
问题描述：
it is fun to do 还是 doing?
it is no use doing 还是 to do
划一下句子成分
答
doing分词和to do不定式都可以作为整个句子的表语成分，从语法上来说是没错的，但是一般来说It's no use to do sth.是比较惯用的说法。
答
应该用不定式------to do. it 是形式主语，to do 是真实主语。
答
整体段落是这样的，原文出自--NEW YORK TIMES
Obama made the case that because Democrats and Republicans alike agree that the vast majority of Americans should be saved from a tax hike, "there is absolutely no reason, none," not to make it happen before the deadline 10 days from now.
答
to do 做实际主语
答
It is no use/goood doing sth固定搭配,做某事没有用