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
1. 表示能够延续动作的动词,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。
2. 表示时间段的短语有: for+ 一段时间, for 2 years; since 从句,
since he came here; since+ 时间点名词, 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?
二、非延续性动词
1. 非延续性动词也称终止性动词、瞬间动词,表示不能延续动作的
动词,这种动作发生后立即结束。
如:open, die, close, begin, finish, come, go, move, borrow, lend, buy 等。
2. 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 o'clock
例: He died 5 years ago.
3. 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 haven' t left here for 3 years.
I haven' t heard from him for 3 weeks.
三、延续性动词与非延续性动词之间的转换
leave --- be away, borrow --- keep, buy --- have, begin/start --- be on, die --- be dead, finish --- be over, join --- be in+ 组织机构 , be a member of+ 组织机构 , open sth --- keep sth open, fall ill --- be ill, get up---be up, catch a cold --- have a cold, come here --- be here, go there --- be there, become --- be, come back --- be back, fall asleep --- be asleep, get to/ arrive/reach --- be (in), leave --- be away from, get to know --- know, go (get) out → be out , put on → wear, catch a cold → have a cold 等。
例: The old man died 4 years ago. ----The old man has been dead for 4 years.
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.
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