第1个回答 2018-07-09
动词的过去式有两种形式:一种是除不规则变化外,在动词词尾接后缀–ed,如 worked;一种是在动词前面加助动词 did,如 did work(did work 的 work是动词原形,不能叫做现在时态)。前者用于肯定句,后者用于疑问句、否定句或加强语气。因此,反意疑问句如果用 did,前面的陈述句应该是过去式。例如: He worked hard, did he? He like to have a trip before, did he? 一般过去时态出现did动词就要用原型吗? 不一定,如果谓语动词本身就是did就不需要再接动词原形了.如:He did hs homework after school. 在一般疑问句 否定句 或强调谓语动词时实意动词需要还原, 如:Did he do his homework after school?He did not do his homework after school. He did do his homework after school.他的确在放学后写作业. 英语中did,been后面接的动词是什么时态的(一般式还是过去式还是过去分词)要看具体句子,一般来说,did因为已经表示过去时态了,在句子中做助动词,后面加动词原形,如 I did my homework yesterday.(我昨天做了作业.)而been是be的完成时,一般与have been连用.如果这个been作助动词,那么后面加动词的分词形式,可以是I have been doing homework the whole morning.(我已经做作业做了一早上了.强调一直在做.)或者These books have been taken away.(这些书已经被拿走了.强调被动).