He must have finished the work by himself by the end of last month,____he?
He must have finished the work by himself by the end of last month,____he?
為什么填hadn't啊?為什么不填hasn't?為什么不填didn't?
原句是must have ……,也就是說(shuō)是現(xiàn)在完成時(shí),那應(yīng)該填hasn't啊,但為什么不填這個(gè)?
什么時(shí)候又可以用didn't?
為什么填hadn't啊?為什么不填hasn't?為什么不填didn't?
原句是must have ……,也就是說(shuō)是現(xiàn)在完成時(shí),那應(yīng)該填hasn't啊,但為什么不填這個(gè)?
什么時(shí)候又可以用didn't?
英語(yǔ)人氣：879 ℃時(shí)間：2019-09-09 17:28:41
優(yōu)質(zhì)解答
要根據(jù)整個(gè)句子的時(shí)間狀語(yǔ)來(lái)選擇這類反意疑問(wèn)句的助動(dòng)詞.1.如果沒(méi)有任何時(shí)間狀,可以用have或has.eg.He must have gone to the library,hasn't he?2.如果有表示過(guò)去的時(shí)間狀語(yǔ)則用did.eg.He must have read this book...
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