10．Your classroom is very clean．
 Yes，it ______ every day．（　　）
A．is cleanedB．cleansC．is cleaning

分析 -你們的教室很干凈．
-當(dāng)然了，它每天被打掃．

解答 答案：根據(jù)題干中的部分it ______ every day聯(lián)系上句可知it在這里代指classroom，做句子的主語(yǔ)，結(jié)合選項(xiàng)中的動(dòng)詞clean可知，主語(yǔ)由物充當(dāng)，它是動(dòng)詞clean的動(dòng)作承受者，應(yīng)該是教室被人打掃，表被動(dòng)，所以此處應(yīng)用被動(dòng)語(yǔ)態(tài)；根據(jù)時(shí)間狀語(yǔ)every day可知此句應(yīng)用一般現(xiàn)在時(shí)態(tài)；兩者綜合可知此句應(yīng)該用一般現(xiàn)在時(shí)的被動(dòng)語(yǔ)態(tài)去完成，其構(gòu)成為am/is/are+動(dòng)詞的過(guò)去分詞；主語(yǔ)為單數(shù)it，所以助動(dòng)詞用is．故選A．

點(diǎn)評(píng) 此類(lèi)題型主要是確定句子主語(yǔ)和謂語(yǔ)的關(guān)系，如果是主動(dòng)關(guān)系就用主動(dòng)語(yǔ)態(tài)；反之如果是動(dòng)賓關(guān)系則要用被動(dòng)語(yǔ)態(tài)；還要注意時(shí)態(tài)的確定．兩者有機(jī)結(jié)合就能做出正確的選擇．

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