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1、延续性动词与非延续性动词及其转换动词按其动作发生的方式、发生过程的长短可分为延续性动词与非延续性动词。一.延续性动词表示能够延续的动作，如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。延续性动词可以与表示时间段 的 状语连用。表示时间段的短语有：（l）for+一段时间，如：for 2 years; （2） since从句，如since he came here; since+过去时间点名词，如 since last year, since 5 days
2、agOo 例：He has lived here for 6 years.You can keep the book for 5 days.二，非延续性动词也称终止性动词、瞬间动词，表示不能延续的动作，这种动作发 生后立即结束。 如:open, die, dose, begin, finish, come, go, move, borrow, lend, buy 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 50doek;例：He died 5 years ago.三.延续性动词与非延续性动词之间的转换：（考试重点）例：He left five mi
3、nutes ago. = He has been away for five minutes.这句话的意思是指他离开的动作是5分钟之前发生的，是过去时。也就是说 从他离开到现在已经有五分钟了，这个动作是延续的，要用现在完成时，并 且要把原来的短暂性动词改为延续性动词。一些短暂性动词及相应的延续性动词：arrive ( get to /reach ) - be here (in)begin(start) be ondie - be deadcome here (back) be here (back)leave - be away (from)fall ill(sick9 asleep)-be
4、ill(sick9 asleep)get up一 be upgo/ get out (there) 一 be out (there)finish - be overput on - wear 或 be onopen be open (keep sth. open)join - be in 或 be a member of+组织机构close be closedgo to school be a studentborrow -keepbuy/get - have catch(a cold) have(a cold)get to know - know begin to study - study come to work work move to - live in Hnish 一 be over come to - be in sit down - be seated marry - be married dress - be dressed become be