问题描述: li ping cleand the classroom after class .(变为否定句)和(一般疑问句) 1个回答 分类:英语 2014-11-04 问题解答: 我来补答 Li Ping cleaned the classroom after class .(变为否定句)和(一般疑问句)一般疑问句:Did Li Ping clean the classroom after class?否定句:.Li Ping didn't clean the classroom after class . 展开全文阅读