助动词和情态动词后面当然要用原型了,不管是过去式不是,后面动词都要原型.你给出的例句:“do some reading”,是你自己误解了,此处 do 不是助动词,而是实义动词 “做”的意思.此处reading 是作名词讲,“读书”.可不是动词又加了ing的形式的.
eg.I can play piano.
B:I did some reading.这里的reading是名词吗?回答:是的.reading是读书活动的意思.
你还可以回答 I did some homework,我做了家庭作业.这里homework当然就是名词了.
然为你完全可以这样回答 :I went to the park,我去了公园.或是I played basketball,我打了篮球.这里就不再用did 了.你会更明白一点.追问:那是不是助动词情态动词后的动词永远没其它形式比如ing 单三 之类的,都是原型?除了动词的名词形式?回答:A :What did you do last weekend
这里did 才是助动词,后面的do是实义动词“做”的意思.在你最原始的提问中,你就已经误解了.
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