Today, computers are really helpful. They ____ everywhere.
A.useB.a(chǎn)re usedC.usedD.were used
B

試題分析:根據(jù)語境可知此題考查的是一般現(xiàn)在時(shí)的被動(dòng)語態(tài)的基本構(gòu)成和用法。整個(gè)文句的含義是現(xiàn)在電腦非常有用,他們被應(yīng)用到各個(gè)領(lǐng)域,主語是they,電腦,是動(dòng)作的承受者,并且是習(xí)慣性的動(dòng)作,故用一般現(xiàn)在時(shí)的被動(dòng)語態(tài)。主語是復(fù)數(shù)故選B。
點(diǎn)評(píng):被動(dòng)語態(tài)表示主語是動(dòng)作的承受者。被動(dòng)語態(tài)是動(dòng)詞的一種特殊形式,一般說來,只有需要?jiǎng)幼鲗?duì)象的及物動(dòng)詞才有被動(dòng)語態(tài)。漢語往往用“被”、“受”、“給”等詞來表示被動(dòng)意義。被動(dòng)語態(tài)由“助動(dòng)詞be+及物動(dòng)詞的過去分詞”構(gòu)成。被動(dòng)語態(tài)的時(shí)態(tài)變化只改變be的形式,過去分詞部分不變。疑問式和否定式的變化也如此。
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