现在完成时中瞬间动词如何变成延续性动词

比如说He borrowed a book a month ago, 如果我们想表达他拿这本书1个月了需要说he has kept the book for a month, 在完成时态中我们用Kept代替borrow能很好的表达持续性这一动作

我们如果说她三年前结婚了，我们可以说she  married three years ago, 用完成时态时我们需要改成这样，she has been married for 3 years.

非延续动词是比较多的，下面我列举一部分，如leave, borrow, buy, start, begin, move to, end, come , open, become, get up等等

对于上述非延续动词它们对应的延续动词是be away, keep, have, be on, live in , be over, be back, be open, be up等等

我们举些例子，我们先拿leave来举例，she left 2 weeks ago, 这是过去式，说明她两周前走了，我们表达她已经走了两周了，就可以说，she has be away for 2 weeks

我们再拿open来举例，the gate of the yard was open yesterday,那个院子的大门，昨天是开着的，我们表达院子的门自从昨天就开了，我们可以说，the gate of the yard has been open since yesterday.