-- ______did your uncle leave his hometown ?--He ______ for nearly twenty years.
A.When, has leftB.When, has been away
C.How long, has leftD.How long, has been away
B

試題分析:when什么時候;how long多長。句意:你的叔叔什么時候離開的他的家鄉(xiāng)?——他大概離開將近二十年了。Leave是瞬間動詞,不能和表示一段時間的時間狀語連用,結(jié)合語境可知選B。
點評:完成時態(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調(diào)的是動作的完成,持續(xù)性動詞強調(diào)的是動作的持續(xù)性。現(xiàn)在完成時態(tài)中表示一段時間的時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間的時間狀語連用,需注意區(qū)分。
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