9．-Ming ming，you _______TV for three hours．You should have a rest．
-OK．Mum．（　�。�
A．have watchedB．are watchingC．watches

分析 ---明明，你已經(jīng)看電視三個(gè)小時(shí)了．你應(yīng)該休息一下了．---好的，媽媽?zhuān)?/p>

解答 答案：A．根據(jù)"you _______TV for three hours"中的"for three hours"可知看電視這個(gè)動(dòng)作從過(guò)去一直到現(xiàn)在有三個(gè)小時(shí)了，與現(xiàn)在有關(guān)，表動(dòng)作從過(guò)去延續(xù)到現(xiàn)在，要用現(xiàn)在完成時(shí)，現(xiàn)在完成時(shí)的構(gòu)成：主語(yǔ)+have或has+動(dòng)詞過(guò)去分詞，故選A．

點(diǎn)評(píng) 本題考查現(xiàn)在完成時(shí)，掌握現(xiàn)在完成時(shí)的意義，構(gòu)成，根據(jù)關(guān)鍵詞確定時(shí)態(tài)．

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