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        1. The earthquake ______ when I _______some cleaning.
          A.starts, was doingB.started, was doing
          C.was starting, was doingD.starts, were doing
          B

          試題分析:根據(jù)語境可知此句的含義地震的時(shí)候我正在打掃衛(wèi)生。此題重點(diǎn)考查的是when引導(dǎo)的狀語從句表示當(dāng)…的時(shí)候。其強(qiáng)調(diào)的是當(dāng)一個(gè)動(dòng)作發(fā)生的時(shí)候另一個(gè)動(dòng)作正在進(jìn)行,強(qiáng)調(diào)狀態(tài),故選B。
          點(diǎn)評(píng):在when引導(dǎo)的時(shí)間狀語從句中,其謂語動(dòng)詞可以是延續(xù)性的,也可以是非延續(xù)性的,可與主句中的謂語動(dòng)詞同時(shí)發(fā)生,也可在其后發(fā)生。while只能表示某一段時(shí)間,不能表示某一點(diǎn)時(shí)間。在while引導(dǎo)的時(shí)間狀語從句中,其謂語動(dòng)詞只能是延續(xù)性的,而且也只能與主句中的謂語動(dòng)詞同時(shí)發(fā)生或存在。
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