help sb.do sth.
buy
I helped Tom buy 還是I helped Tom bought
I helped Tom buy 還是I helped Tom bought
用合適的形式:
I helped Tom ____(buy) a watch.
那 did 后面的動(dòng)詞要改變?cè)螁?
在過(guò)去式里有沒(méi)什么句子前面動(dòng)詞要改變,后面動(dòng)詞也要改變?
用合適的形式:
I helped Tom ____(buy) a watch.
那 did 后面的動(dòng)詞要改變?cè)螁?
在過(guò)去式里有沒(méi)什么句子前面動(dòng)詞要改變,后面動(dòng)詞也要改變?
英語(yǔ)人氣：718 ℃時(shí)間：2020-06-02 00:40:31
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