1、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
2、 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：非延续性动词 延续性动词 非延续性动词 延续性动词leave be away join be in/be a member ofborrow keep open be open buy have fall ill be illbegin/
3、start be on get up be updie be dead catch a cold have a coldmove to live in come here be hereendfinish be over go there be therecome back be back get to/ arrive / reach be inget to know know put on weargo (get) out be out become beHis father has died.His father has been dead for three years.他父亲已经去世三
4、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 months.他已经入党/团两个月了。The film has started/begun.The film has been on/ lasted since 5 minutes ago.电影已经开始 5 分钟了。He has gone to Yangzhou.He has been in Yangzhou 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
