要視情況而定,
must have done 表示對(duì)過(guò)去情況的推測(cè),
有明確的過(guò)去的時(shí)間狀語(yǔ)時(shí)用did 反問(wèn),
無(wú)則用have/has 反問(wèn).
所以這個(gè)問(wèn)題,兩者均可.
對(duì)It must have rained .進(jìn)行反問(wèn)應(yīng)用didn’t it還是hasn’t it?
對(duì)It must have rained .進(jìn)行反問(wèn)應(yīng)用didn’t it還是hasn’t it?
英語(yǔ)人氣：531 ℃時(shí)間：2019-10-09 13:58:59
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