A. | has started; has been on. | B. | has been on; has been on | ||
C. | started; has been on | D. | started; has started |
分析 電影半小時(shí)前就開始了,已經(jīng)開演三十分鐘了.
解答 答案:C.考查現(xiàn)在完成時(shí)態(tài).句意"電影半小時(shí)前就開始了,已經(jīng)開演三十分鐘了.".第一個(gè)空,根據(jù)half an hour ago半小時(shí)前,可知用一般過去時(shí)態(tài),因此A,B不正確.第二個(gè)空,for+段時(shí)間,通常用于現(xiàn)在完成時(shí)態(tài),start開始,非延續(xù)性動(dòng)詞,不能用于現(xiàn)在完成時(shí)態(tài),應(yīng)該變?yōu)橄鄳?yīng)的延續(xù)性動(dòng)作用has been on上演,因此D不正確.答案是C.
點(diǎn)評(píng) 現(xiàn)在完成時(shí)態(tài),由"have/has+過去分詞"構(gòu)成,表示動(dòng)作發(fā)生在過去,但與現(xiàn)在的情況有聯(lián)系.也表示從過去某一時(shí)間開始一直延續(xù)到現(xiàn)在并還可能繼續(xù)延續(xù)下去的動(dòng)作.結(jié)合語境,注意人稱變化、動(dòng)詞過去分詞變化及延續(xù)性動(dòng)詞的使用等.
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