一般疑问句(二) 三、难点、易错点 1. 借助助动词 do, does 或 did 时,后面的动词没有变为动词原形。如: He made the bed yesterday. -误:Did he made the bed yesterday? - 正:Did he make(用原形)in a factory? He works in a factory. - 误:Does he works in a factory? - 正:Does he work(用原形)in a fa http://m.niuyingyu.cn/xxyy/yinianji/sannianji/yufa/6906.html