—Jane, have you finished your paper?
—No, I ________ my sister with her drawing all the morning.
A.helpB.helpedC.was helpingD.have been helping
D

試題分析:考查時(shí)態(tài)。本題的關(guān)鍵詞是后面的時(shí)間狀語(yǔ)all the morning該詞與現(xiàn)在完成進(jìn)行時(shí)連用,表示動(dòng)作從過(guò)去開(kāi)始一直持續(xù)到現(xiàn)在,還在發(fā)生。句意:—Jane,你寫(xiě)完論文了嗎?—沒(méi)有,整個(gè)早晨我都在幫助我的姐姐在畫(huà)畫(huà)。故D正確。
點(diǎn)評(píng):時(shí)態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時(shí)間狀語(yǔ)。要根據(jù)時(shí)間狀語(yǔ)來(lái)選擇合適的時(shí)態(tài),在平時(shí)的學(xué)習(xí)中要注意積累有關(guān)時(shí)態(tài)的用法和各種時(shí)態(tài)的特殊之處。如since, so far等經(jīng)常與現(xiàn)在完成時(shí)連用。在條件狀語(yǔ)從句中用一般現(xiàn)在時(shí)代替將來(lái)時(shí)等等。
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