现在完成时中瞬间动词变延续性动词总结
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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.
女口：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 years或He has joined the army.
He joined the army two years ago.
切记：有些动词是非延续的，在此用法中要换成其相对应的延续性动词：
His father has died.
His father has been dead for three years.
他父亲已经去世三年了。
She has joined the Party/League.
She has been in the Party/ League for two months.=She has been a Party/ League member for two mon ths.
他已经入党/团两个月了。
The film has started/begu n.
The film has bee n on / lasted since 5 minu tes ago.
电影已经开始5分钟了。
He has gone to Yan gzhou.
He has bee n in Yan gzhou for 3 days.
他已经去扬州三天了。
【习题】When Jack arrived he learned Mary _________ for almost an hour
(leave) 答案：had been away