3．---When____you_____the new bike？---I_____it for 2days．（　�。�
A．did，have，boughtB．did，buy，have had
C．did，buy，have bought   

分析 --你什么時(shí)候買的那輛新自行車？
--我買了兩天了．

解答 答案：B．
 根據(jù)問句的題干"你什么時(shí)候買的那輛新自行車？"即提問過去的動(dòng)作開始的時(shí)間，所以用一般過去時(shí)，這是一個(gè)特殊疑問句，應(yīng)借助于助動(dòng)詞did．前面使用了助動(dòng)詞，后面的謂語動(dòng)詞要使用原形buy．答語中，句中的時(shí)間狀語for+時(shí)段是現(xiàn)在完成時(shí)的標(biāo)志，且句子中的謂語動(dòng)詞必須是延續(xù)性動(dòng)詞，現(xiàn)在完成時(shí)的構(gòu)成是：主語+have/has+動(dòng)詞的過去分詞； 動(dòng)詞buy是一個(gè)非延續(xù)性動(dòng)詞，轉(zhuǎn)換成have之后才可以與時(shí)間段連用，表示動(dòng)作延續(xù)了一段時(shí)間，故答案為B．

點(diǎn)評(píng) 本題考查了動(dòng)詞的時(shí)態(tài)．做題時(shí)，一定要特別關(guān)注有關(guān)的時(shí)間短語，這是判斷句子時(shí)態(tài)的標(biāo)志．在沒有時(shí)間狀語的情況下可以聯(lián)系上下文根據(jù)語境來做出正確判斷．

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