Question

—________did your uncle leave his hometown?
—He ________ for nearly twenty years.

A．When; has left	B．When; has been away
C．How long; has left	D．How long; has been away

Answer 1

B

試題分析：when什么時(shí)候；how long多長(zhǎng)；根據(jù)下文時(shí)間狀語(yǔ)，將近二十年了�？芍�上文提問(wèn)的是時(shí)間長(zhǎng)短，下文描述的是從過(guò)去某時(shí)持續(xù)到現(xiàn)在的狀態(tài)，故謂語(yǔ)動(dòng)詞用持續(xù)性動(dòng)詞，故選B。
點(diǎn)評(píng)：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。現(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。