问题描述: there are many boys and girls on the playground.改为否定和疑问 1个回答 分类:英语 2014-10-01 问题解答: 我来补答 there are many boys and girls on the playground.改为否定和疑问there aren't many boys and girls on the playground.Are there many boys and girls on the playground? 展开全文阅读