现在完成时：非延续性动词到延续性动词的转换

英语自学网

现在完成时可以和带有since或for等表示“一段时间”的状语连用,表示动作或状态从某一时刻开始，一直持续到现在。
        如：I haven't seen him for two years.
        但是，像come,arrive,buy等终止性动词不能与表示“一段时间”的状语连用。要用，必须改为“be(在)”等延续性动词来表述。
        现归纳总结一下由非延续性动词到延续性动词的转换：
        　　arrive→be here begin(start)→be on
        　　die →be dead come back→be back
        　　leave →be away fall ill(sick,asleep)→be ill(sick,asleep)
        　　get up→be up go out →be out
        　　finish →be over put on →wear 或be on
        　　open →be open join →be in或 be a member of…
        　　close →be closed go to school→be a student
        　　borrow →keep buy →have
        　　catch(a cold)→ have(a cold) get to know →know
        　　begin to study→study come to work→work等
        如：He has been a soldier for three years.他参军三年了。
        　　His father has been dead for two years.他父亲去世二年了。
        　　The film has been on for ten minutes.电影已开始十分钟了。
        　　We have studied English for three years. 我们(开始)学英语已三年了。