1.he usually does his housework at night.改为否定句
问题描述：
1.he usually does his housework at night.改为否定句
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：）