问题描述: To learn Chinese is difficult for a foreigner.改为用it作形式主语的句子 1个回答 分类:英语 2014-10-28 问题解答: 我来补答 It is difficult for a foreigner to learn Chinese.It做形式主语,to do 做真实主语的形式就是 it is + adj.+ (for sb) + to do sth.很简单的. 展开全文阅读