一、延续性动词和终止性动词的概念英语中，动词按其动作发生的方式、动作发生过程的长短，可分为延续性动词和终止性动词。

延续性动词表示能够延续的动作，这种动作可以延续下去或产生持久影响。

如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。

终止性动词也称非延续性动词、瞬间动词或短暂性动词，表示不能延续的动作，这种动作发生后立即结束。

如open, close, finish, begin, come, go, arrive, reach, get to, leave,move, borrow, buy等。

二、延续性动词的用法特征1.延续性动词可以用于现在进行时和现在完成进行时；延续性动词还可以用于现在完成时与表示"段时间"的状语连用。

表示"段时间"的短语有：for two years, during the pastthree years, since last year, how long等。

如：I have learned English since I came here.自从我来到这儿就学英语了。

2.延续性动词不能与表示短暂时间的"点时间"状语连用。

如：It rained at eight yesterday morning.(误) rain为延续性动词，而at eight表示"点时间"，前后显然矛盾。

如果用延续性动词表示一瞬间的动作，可以借助come, begin, get等终止性动词来表示。

上句可改为：It began to rain at eight yesterday morning.(正)又如：-When did you get to know Jack?-Two years ago.-Then you've known each other for more than two years.-That's right.三、终止性动词的用法特征1.终止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.终止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(只限肯定式)。

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为终止性动词，不能与表示"段时间"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：(1)将句中终止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：①用相应的延续性动词：leave →be away, borrow →keep, buy →have, catch a cold →have a cold ，come/go →be , put on → wear ②换成be+名词：join →be in/be a member of, go to school →be a student , become a teacher → be a teacher ，open sth. →keep sth. open,③换成be+形容词或副词：die →be dead, begin/start →be on, leave→ be away, fall asleep → be asleep, get up →be up, fall ill →be ill, open → be open, close →be closed, wake up →be awake finish→ be over;④换成be+ 介词短语move to +地点→live in+地点,go to/come to +地点→be in /at+地点,join the army →be inthe army。

(2)将句中表示"段时间"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。

(3)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。

(4)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.终止性动词可用于现在完成时否定式中，成为可以延续的状态，因而可与表示一段时间的状语连用。

如：He hasn't left here since 1986.I haven't heard from my father for two weeks.4.终止性动词的否定式与until/till连用，构成"not+终止性动词+until/till ..."的句型，意为"直到……才……"。

如：You can't leave here until I arrive.直到我到了，你才能离开这里。

I will not go to bed until I finish drawing the picture tonight.今天晚上直到我画完画，我才上床睡觉。

5.终止性动词可以用于when引导的时间状语从句中，但不可以用于while引导的时间状语从句中。

when表示的时间是"点时间"(从句谓语动词用终止性动词)，也可以是"段时间"(从句谓语动词用延续性动词)。

而while表示的是一个较长的时间或过程，从句谓语动词用延续性动词。

如：When we reached London, it was twelve o'clock. (reach为终止性动词) Please look after my daughter while/when we are away. (be away为延续性动词短语)6.终止性动词完成时不可与how long连用(只限于肯定式)。

如：误：How long have you come here?正：How long have you been here?正：When did you come here?补充经典例题他的狗死了两周了.(完成句子)His dog has _______ ________ for two weeks.思维分析:该句是现在完成时, for two weeks 是一段时间,因此谓语动词不能是died;而应该是延续性动词或静态性动词,故用be dead 代替died.答案: been deadHe has _______ his hometown for ten years.A. leftB. leavedC. been away fromD. be away思维分析: for ten years 为一段时间,故选用的动作必须是延续性的,A是非延续的；B过去分词形式也不对；D be away短语不全并且be 没有变成been.答案: C如果非延续性动词和一段时间状语连用,则需要将其换成和其相应的延续性动词或者相应的形容词.初中阶段涉及的主要有:come—be, go out—be out, get to/arrive in—be in, borrow—keep, buy—have, leave—be away, die—be dead, join—be a…/be in, begin—be on, finish—beover.如:他已经参军8年了.误:He had joined the army for 8 years.正:He has been a soldier for 8 years.He has been in the army for 8 years.表示过去已经开始,持续到现在的动作或状态,可以表示从过去某一时刻延续到现在.(包括现在)的一段时间状语连用。

2.构成:主语+ has / have + 过去分词+﹛①for + 一段时间；②since + 点时间；③since +从句，从句时态常用一般过去时态﹜如：I have lived here for 5 years.He has taught in this school since 1990.She has never called on me since she moved to the country.注意:当现在完成时表示过去的动作一直延续到现在时,其动词不能用短暂性的,必须用延续性的动词. 如：我买这部车已经2年了.I have had this car for 2 years. (用have 不用buy)试比较以下短暂性动词和延续性动词.buy—have, borrow—keep, die—be dead, open—be open, close—be closed, leave—beaway(from), join—be in / be a member of。