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；根據(jù)下文時(shí)間狀語，將近二十年了�？芍�上文提問的是時(shí)間長短，下文描述的是從過去某時(shí)持續(xù)到現(xiàn)在的狀態(tài)，故謂語動詞用持續(xù)性動詞，故選B。
點(diǎn)評：完成時(shí)態(tài)中的動詞有瞬間動詞和持續(xù)性動詞之分，瞬間動詞的過去分詞強(qiáng)調(diào)的是動作的完成，持續(xù)性動詞強(qiáng)調(diào)的是動作的持續(xù)性。現(xiàn)在完成時(shí)態(tài)中表示一段時(shí)間的時(shí)間狀語不能和瞬間動詞連用，持續(xù)性動詞不能和表示瞬間時(shí)間的時(shí)間狀語連用，需注意區(qū)分。