8.I'm puzzled why he ______ back to me.He should have heard from me.( 。
A.hasn't writtenB.didn't write
C.doesn't writeD.hasn't been writing

分析 我不明白他為什么沒(méi)給我回信,他早該收到我的來(lái)信了.

解答 答案:A
根據(jù)"He should have heard from me"可知,他已經(jīng)收到我的來(lái)信了;因此這里應(yīng)表示過(guò)去的動(dòng)作(他收到我的來(lái)信)對(duì)現(xiàn)在造成的結(jié)果,即他還沒(méi)給我回信;故應(yīng)使用現(xiàn)在完成時(shí);D.現(xiàn)在完成進(jìn)行時(shí);表示從過(guò)去某時(shí)間開(kāi)始,一直延續(xù)到現(xiàn)在,并且還有可能持續(xù)下去的動(dòng)作;而此處并不強(qiáng)調(diào)動(dòng)作的持續(xù)性,故選A

點(diǎn)評(píng) 本題考查了現(xiàn)在完成時(shí)的用法.做本題時(shí),首先應(yīng)根據(jù)句意,判斷空缺處的動(dòng)作發(fā)生的時(shí)間以及所表達(dá)的意義;其次,應(yīng)注意區(qū)分現(xiàn)在完成時(shí)與現(xiàn)在完成進(jìn)行時(shí)的用法區(qū)別;因此,做類(lèi)似的時(shí)態(tài)題時(shí),需要熟練掌握各時(shí)態(tài)所表達(dá)的意義及用法.

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