现在完成式中瞬间性动词如何变为延续性动词。在完成式中,一个瞬间性动词(一次性动作如buy，borrow,die,leave,begin,join等)不能与表示一段时间的状语(for, since, how long等)连用,此时须将该瞬间动词改为延续性动词或状态动词. 如：He borrowed a book two days ago.(用现在完成式表达）He has kept the book for two days.他持有这本书两年了。1、他三年前买了一辆车。_ 2、他两年前参了军。 _答案：1、He has had a car for three years.或He has bought a car. 或He bought a car three years ago.2、 He has been in the army for two yea
