瞬间性动词：动作发生后立即结束.accept,arrive,become,begin,borrow,break,buy,catch,close,come,die,end,fall,finish,get,give,go,join,leave,put,reach等
延续性动词：动作可以延续,并产生影响.be,have,keep,know,learn,lie,live,read,sing,sleep,stand,stay,wait,walk,watch等