7.Mary _____ a photo of Professor Smith while he was making a speech.( 。
A.takesB.tookC.would takeD.has taken

分析 當(dāng)史密斯教授在做演講時(shí),瑪麗給他拍了張照片.

解答 答案:B
句中的while"在…時(shí)候","一邊…一邊…";它強(qiáng)調(diào)主句的動(dòng)作與從句的動(dòng)作同時(shí)發(fā)生或主句的動(dòng)作發(fā)生在從句的動(dòng)作過(guò)程中;所以根據(jù)while 從句使用了過(guò)去進(jìn)行時(shí)( was making a speech)可知,主句的動(dòng)作"_____ a photo of Professor Smith 給史密斯教授拍照"應(yīng)該發(fā)生在"他(過(guò)去)在做演講"的過(guò)程中或者也可以說(shuō)兩個(gè)動(dòng)作在同時(shí)發(fā)生,所以此處要使用一般過(guò)去時(shí);A.takes 是一般現(xiàn)在時(shí)態(tài);B.took是take的一般過(guò)去是形式;C.would take是過(guò)去將來(lái)時(shí);D.has taken 是現(xiàn)在完成時(shí);故選B.

點(diǎn)評(píng) 本題考查了一般過(guò)去時(shí)在while從句中的用法,但是while從句中的謂語(yǔ)必須是表示動(dòng)作或狀態(tài)的延續(xù)性動(dòng)詞,它強(qiáng)調(diào)主句的動(dòng)作與從句的動(dòng)作同時(shí)發(fā)生或主句的動(dòng)作發(fā)生在從句的動(dòng)作過(guò)程中;因此當(dāng)while從句使用過(guò)去進(jìn)行時(shí),主句應(yīng)使用一般過(guò)去時(shí);本句動(dòng)詞take的過(guò)去時(shí)形式是took,因此還需要熟練掌握動(dòng)詞不規(guī)則變化表.

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