--- ________ did your uncle leave his home town?.
--- Let me see. He _______ for nearly twenty years.
A.When; has leftB.When; has been away
C.How long; has left D.How long; has been away
B

試題分析:句意:你的叔叔什么時(shí)候離開(kāi)了他的家鄉(xiāng)?——讓我想想。他已經(jīng)離開(kāi)將近二十年了。結(jié)合語(yǔ)境可知上文描述的是過(guò)去發(fā)生的動(dòng)作,故用一般過(guò)去時(shí)態(tài)。下文描述的是從過(guò)去一直持續(xù)到現(xiàn)在的動(dòng)作,故用現(xiàn)在完成時(shí)態(tài)。瞬間動(dòng)詞不能和表示一段時(shí)間的時(shí)間狀語(yǔ)連用,leave表示瞬間動(dòng)作,故選B。
點(diǎn)評(píng):英語(yǔ)中的時(shí)態(tài)主要是借助于時(shí)間狀語(yǔ)與上下文語(yǔ)境來(lái)進(jìn)行判斷。解答此類題型,首先要注意句子中的時(shí)間狀語(yǔ),如果沒(méi)有則要通過(guò)分析上下文,結(jié)合語(yǔ)境來(lái)判斷句子的時(shí)態(tài)。完成時(shí)態(tài)中的動(dòng)詞有瞬間動(dòng)詞和持續(xù)性動(dòng)詞之分,瞬間動(dòng)詞的過(guò)去分詞強(qiáng)調(diào)的是動(dòng)作的完成,持續(xù)性動(dòng)詞強(qiáng)調(diào)的是動(dòng)作的持續(xù)性,F(xiàn)在完成時(shí)態(tài)中表示一段時(shí)間的時(shí)間狀語(yǔ)不能和瞬間動(dòng)詞連用,持續(xù)性動(dòng)詞不能和表示瞬間時(shí)間的時(shí)間狀語(yǔ)連用,需注意區(qū)分。
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