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1. 非延续性动词可用来表示某一动作完成，因此可用于现在完成时。如：
The train has arrived. 火车到了。
Have you joined the computer group? 你加入电脑小组了吗?
2. 非延续性动词表示的动作极其短暂，不能持续。因此，不可与表示一段时间的状语连用(只限肯定句)。如：
(1) 他死了三年了。
误：He has died for three years.
正：He has been dead for three years.
正：He died three years ago.
正：It is three years since he died.
正：Three years has passed since he died.
(2) 他来这儿五天了。
误：He has come here for five days.
正：He has been here for five days.
正：He came here five days ago.
正：It is five days since he came here.
正：Five days has passed since he came here.
(1)、(2)句中的die、come为非延续性动词，不能与表示“时间段”的状语连用。那么，应如何正确表达呢?可以采用下面的四种方法：
a. 将句中非延续性动词转换为相应的延续性动词，如上面两例中的第一种正确表达方式。下面列举几例：leave→be away, borrow→keep,
buy→have, begin/start→be on, die→be dead, move to→live in, finish→be over,
join→be in/be a member of, open sth.→keep sth. open, fall ill→be ill, get up→be
up, catch a cold→have a cold。
b. 将句中表示“时间段”的状语改为表示过去确定时间的状语，如下面两例中的第二种正确表达方式。
c. 用句型"It is+段时间+since..."表达原意，如上面两例中的第三种正确表达方式。
d. 用句型"时间+has passed+since..."表达原意，如上面两例中的第四种正确表达方式。
3. 非延续性动词可用于现在完成时否定式中，成为可以延续的状态，因而可与表示“时间段”的状语连用。如：
He hasn't left here since 1986. 从1986年以来他就没离开过这里。
I haven't heard from my father for two weeks. 我已经两周没收到我父亲的来信了。
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发表于 2016-7-9 17:51:47
