问题描述： 1.he usually does his housework at night.改为否定句 1个回答 分类：英语 2014-12-12 问题解答： 我来补答 否定句：He usually doesn't do his housework at night.方法：因为主语是第三人称单数he,于是借助助动词does,且改为否定,也就是doesn't ,再放在实义动词do的前面.就可以了：） 展开全文阅读
