1.身份
DO和DOES是哥儿两,表示经常或通常发生的事件用,也就是语法里的,一般现在时
did 是上面兄弟的"前生",是它们的过去 时
2.任务:
(1)起帮工作用,帮助实意动词提问和否定
(2)力所能及自己干,可以接宾语
DO,DID,DOES怎么用的啊
4个回答
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