问题描述: johniswritingaletter变一般疑问句.否定句.肯.否回答 1个回答 分类:英语 2014-11-15 问题解答: 我来补答 john is writing a letter.一般疑问句Is John writing a letter?肯定回答Yes,he is.否定回答No,he isn't.否定句John isn't writing a letter.希望对你有用. 展开全文阅读