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        1. He often __________emails to his parents on weekends.
          A.sendB.sendsC.is sendingD.will send
          B

          試題分析:根據(jù)語(yǔ)境可知此句的含義是在周末他經(jīng)常在周末給父母發(fā)電子郵件,因句中有副詞often,說(shuō)明是經(jīng)常性的動(dòng)作,故用一般現(xiàn)在時(shí),且主語(yǔ)是he故謂語(yǔ)動(dòng)詞要用單數(shù)形式,故選B。
          點(diǎn)評(píng):一般現(xiàn)在時(shí)表示現(xiàn)在經(jīng)常反復(fù)發(fā)生的動(dòng)作、存在的狀態(tài)或習(xí)慣性的動(dòng)作的時(shí)態(tài)。一般現(xiàn)在時(shí)用行為動(dòng)詞的原形,但第三人稱單數(shù)作主語(yǔ)時(shí),動(dòng)詞的詞尾要加-S。其基本結(jié)構(gòu)是主語(yǔ)+動(dòng)詞原形+賓語(yǔ),.表示經(jīng)常的或習(xí)慣性的動(dòng)作,常與表示頻度的時(shí)間狀語(yǔ)連用。
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