问题描述: It is our duty to keep our classroom clean and tidy.这句话谁做主语谁做谓语 1个回答 分类:英语 2014-12-02 问题解答: 我来补答 it是形式主语,真正的主语是后面的不定式短语to keep our classroom clean and tidy 再问: 我问的是谁是主语谁是谓语 再答: 谓语是is,真正的主语是后面的不定式短语to keep our classroom clean and tidy 展开全文阅读