11．Hurry up!The play _______ for half an hour．（　�。�
A．has been onB．has beganC．has begunD．had begun

分析 快點(diǎn)！演出已經(jīng)開始半個(gè)小時(shí)了．

解答 答案：A．
根據(jù)for half an hour，可知這里是for引導(dǎo)的一段時(shí)間，通常和現(xiàn)在完成時(shí)連用，故本句使用用現(xiàn)在完成時(shí)態(tài)．英語完成時(shí)態(tài)中瞬間動(dòng)詞不能和表示一段時(shí)間的時(shí)間狀語連用，begin表示瞬間動(dòng)作，選項(xiàng)BCD都含有begin，排除掉；選項(xiàng)A用be動(dòng)詞的現(xiàn)在完成時(shí)形式，可以延續(xù)．故選A．

點(diǎn)評 英語完成時(shí)態(tài)中有瞬間動(dòng)詞與持續(xù)性動(dòng)詞之分，瞬間動(dòng)詞只表示瞬間動(dòng)作，不能和表示一段時(shí)間的時(shí)間狀語連用，反之持續(xù)性動(dòng)詞也是一樣．再?zèng)]有時(shí)間狀語的情況下，就要結(jié)合語境具體分析．

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