【題目】He taught us how to use this machine today. (改為一般疑問(wèn)句)
he you how to use this machine today?

【答案】Did;teach
【解析】根據(jù)taught句子時(shí)態(tài)是一般過(guò)去時(shí),謂語(yǔ)是行為動(dòng)詞,變疑問(wèn)句時(shí)借助于助動(dòng)詞did,謂語(yǔ)動(dòng)詞用原形,taught的原形teach,所以答案是:Did; teach。

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