1.他抽烟已经5年了 英语怎么说?

smoke 是延续性动词
He has began to smoke for 5 years
浅谈终止性动词和延续性动词
延续性动词:live,run,stay,clean,play,hold,watch,teach,read,study,teach,eat,drink,write,dance,sing,smoke
瞬间性动词:
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.
5、用wear代替put on
b)用“be＋形容词”代终止性动词
1、be＋married代marry 2、be＋ill代fall (get) ill
3、be＋dead代die 4、be＋asleep代fall (get) asleep
5、be＋awake代wake/wake up 6、be＋gone代lose,die,sell,leave
7、be＋open代open 8、be closed代close/shut
9、be＋missing(gone,lost)代lose
c)用“be＋副词”代终止性动词
1“be＋on”代start,begin
2“be＋up”代get up
3“be＋back(to)”代return to,come back to,go back to
4“be here (there)”代come(arrive,reach,get) here或go (arrive,reach,get) there等等
d)用“be＋介词短语”代终止性动词
1.“be in/at +地点”代替go to /come to
2.用be in the army 代替join the army
3.“be in/at +地点”代替move to

He has been a cigarette addict for 5 years
是瞬间动词

He has been smoking for 5 years

He has been smoking for 5 years already.

he has somked for 5 years
smoke 是延续动词可以与时间段连用

He has been smoking for 5 years

he has somked for 5 years 是短暂性动词

He has been smoking for five yeas.短暂性动词

不要这么死板!
抽烟五年没有其他说法了是不是嘛?
he has been a smoker for 5 years.