可持续性动词， 用来表示主语继续或保持一种状况或态度的动词。 “持续性动词”表示的动作不但可以延续，而且可以产生持久的影响。
1.拥有 have
2.具备、具有 possess
3.保持 keep
4.知道 know
5.学习 learn,study
6.生活 live
7.阅读 read
8.睡觉 sleep
9.等待、等候 wait
10.工作 work
11.看、听、闻 look、heard、smell
12.喝 drink
13.有 have
14.跑 run
用于现在完成时：for+一段时间。
since+时间点
begin和start区别
since+一段时间+ago
since+从句（一般过去时）等
常见的这类动词有：be，have，keep，know，learn，lie，live，read，sing，sleep，stand，stay，wait，walk，watch等。
瞬间性动词（短暂性动词）:
open,stop,like,love,die,win,close,shot,begin,start enter,finish
1、终止性动词：表示不能延续的动作,即动作发生后立即结束.如：begin,arrive,borrow,buy,break,close,come,fall,dic,finish,go,leave,lend,mary,reach,receive,open,sell,start,stop等.
终止性动词的肯定式是不能持续的,所以不能和表示一段时间的状语连用,而终止性的否定式就可以和表一段时间的状语连用,因为否定本身就是可以延续的.
如：have a cold是持续性动词,表示“状态”,可与表延续性的时间状语连用,不定冠词不能省略.
I′ve had a cold since my arrival（到达 n.）.
I didn′t go to school because I had had a bad cold for days.
catch a cold是短暂性动作,表“动态”：它不能和延续性时间状语连用,不定冠词“a”可有可无,catch可用take,get代替.
Put on your coat,or you′ll catch/take/get a cold.
Take care not to get cold.
但是,若cold前有形容词修饰时,则不定冠词不能省.
如：Brown has taken a slight cold.
注意下列句子：
I have caught a cold for over a week.(×)
I have had a cold for over a week.( )
2、延续性动词：表示可以延续一段时间的动作或状态.如：be,drink,fly,eat,keep,lie,live,rain等.
延续性动词常不能和表示一个短暂具体的时间状语连用；这类动词如用于进行时态,则可以和表示一个短暂具体的时刻连用.
He worked at eight yesterday afternoon.(×)
He was working at eight yesterday afternoon.( )
3、代替终止性动词的方法
a)用延续性动词代替终止性动词
1、用have代替buy
My brother has had(不能用has bought) this bike for almost four years.
2、用keep或have代替borrow
I have kept(不能用have borrowed) the book for quite a few days.
3、用be替代become
How long has your sister been a teacher?
4、用have a cold代替catch a cold
Tom has had a cold since the day before yesterday.