1、 可以表示持续的行为或状态的动词，叫做“延续性动词”，也叫“持续性动词” ，如：be, keep, have, like, study, live, etc. 有的表示短暂、瞬间性的动词，叫做“终止性动词” ，也可叫“短暂性动词” ，或“瞬间性动词” ，如 die, join, leave, become, return, reach, etc.延续性动词表示能够延续的动作。如：study, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay, run等。延续性动词可以与表示时
2、间段的状语连用。表示时间段的短语有：for+ 时间，如 for 2 years；since从句，如 since he came here；since+时间点名词，如 since last year, since 5 days ago；how long；for a long time等。例:He has lived here for 6 years.You can keep the book for 5 days.I stayed there for 2 weeks last year. How long did you stay there last year?短暂性动词也称非延续性动词、瞬间
3、动词或终止性动词，表示不能延续的动作,这种动作发生后立即结束。 如:open, die, close, begin, stop, finish, come, go, move, borrow, lend, buy, arrive, enter等。非延续性动词在肯定句中与表示时间点的状语连用，如：two years ago; at 5 oclock;例:He died 5 years ago.否定的终止性动词可以与表示时间段的时间状语连用。例:I havent left here for 3 years. I havent heard from him for 3 weeks.两者的转换leav
4、e - be away,borrow - keep,buy - have,begin/start - be on,die - be dead,finish - be overjoin - be on+组织机构, be a member of+组织机构,open sth - keep sth open,fall ill - be illget up-be up,come here - be here,go there - be there,become - be,come back - be back,fall asleep - be asleepget to/ arrive/reach - b
5、e (in)leave - be away from,get to know - know,go (get) out be out，put on wearcatch a cold have a coldget married-be married等。例:The old man died 4 years ago. -The old man has been dead for 4 years.- It is 4 years since the old man died.-Four years has passed since the old man died.He joined the Party 2 years ago.-He has been in the Party for 2 years. I bought the book 5 days ago. - I have had the book for 5 days. 修饰形容词,副词比较级的常用修饰词有:no, a little, a bit, much, even, still, a lot, a great deal, far, by far, rather, any等.
