问题描述: “please be very quiet”这句话中,为什么要用“be”呢? 1个回答 分类:综合 2014-10-02 问题解答: 我来补答 祈使句中,please 后要接动词原形. be very quiet中, be 是这个词组的动词. 所以用 be如果在陈述句中,要根据主语变的.如He is very quiet.I am very quiet. They are very quiet. 展开全文阅读