unit 5 meeting your ancestors period 3 grammar writing 同步精練（人教版選修8）-文庫(kù)吧
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【正文】 常用于現(xiàn)在完成時(shí)，故選 D。 答案 D 2． We________on this project for four hours. Let39。s have a rest. A． are working B． have been working C． worked D． had worked 解析 從句子的時(shí)間狀語(yǔ) for four hours 和后面的句子 Let39。s have a ，動(dòng)作從過(guò)去發(fā)生，到說(shuō)話的時(shí)候一直在進(jìn)行著。句意：我們?cè)谶@項(xiàng)工程上一直工作了四個(gè)小時(shí)了。咱們休息一會(huì)兒吧。 答案 B 3． I have been studying here for four years, by next summer I________. A． shall graduate B． shall be graduated C． shall be graduating D． shall have graduated 解析 by next summer 是明確表示將來(lái)的時(shí) 間狀語(yǔ)， 主句表示在這個(gè)將來(lái)時(shí)間以前完成的動(dòng)作，故應(yīng)用將來(lái)完成時(shí)。 答案 D 4． Both his parents look they________what39。s happened to him. A． knew B． have known C． must know D． will know 解析 現(xiàn)在完成時(shí)主要強(qiáng)調(diào)過(guò)去發(fā)生的動(dòng)作對(duì)現(xiàn)在造成的影響，或過(guò)去發(fā)生的動(dòng) 作還未結(jié)束，一直持續(xù)到現(xiàn)在或?qū)?lái)，重點(diǎn)在于對(duì)現(xiàn)在的影響。 答案 B 5． The famous writer________one new book in the past two year. A． is writing B． was writing C． wrote D． has written 解析 現(xiàn)在完成時(shí)常與 recently(近來(lái) )， so far(到目前為止 )， in the past/“ last ＋ 一段時(shí)間 ” 等時(shí)間狀語(yǔ)連用。因?yàn)樯鲜龆陶Z(yǔ)表示的是從現(xiàn)在起往前推算的一段時(shí)間，句中的動(dòng)作是從過(guò)去某一時(shí)間或時(shí)刻開(kāi)始持續(xù)到現(xiàn)在的。故應(yīng)選 D。 答案 D 6. —Has Tom finished his job yet? —I have no idea of it。 he________it this morning. A． did B． was doing C． has been doing D． had been doing 解析 注意 “I have no idea of it”這句話的暗示，說(shuō)明只知道過(guò)去的情況，而did還是說(shuō)明過(guò)去做完了，所以用 was doing表示 “ 今天早晨還在做 ” ，并不知道現(xiàn)在是否完成。 答案 B 7． —Why do you want to work for our pany? —This is the job that I________for. A． looked B． am to look C． had looked D． have been looking 解析 答句句意：這就是我一直尋找的工作。現(xiàn)在完成進(jìn)行時(shí)表示從過(guò)去某個(gè)時(shí)刻發(fā)生的動(dòng)作一直持續(xù)到現(xiàn)在，并且有可能持續(xù)下去。 答案 D 8． I hope her health________greatly by the time we e back next year. A． improves
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