一:动词原型怎么变动词过去式
过去分词有规则变化和不规则变化两种。
1) 规则变化
情况 例词 读音与说明
动词原形 过去式 过去分词
一般在动词原形后加-ed look
call
open
need looked
called
opened
needed looked [lukt]
called [kC:ld]
opened [5EupEnd]
needed [ni:did] ①-ed在清辅音音素后
发音为〔t〕,在浊辅音后发音为〔d〕,在元音后发音也为[d]
②-ed在〔t]、〔d〕
后发音为[id]
③但fix的过去式和过去
分词x不双写,为fixed.
以-e结尾的动词加-d move
phone
hope
agree moved
phoned
hoped
agreed moved [mu:vd]
phoned [fEund]
hoped [hEupt]
agreed [E5^ri:d]
以辅音字母加y结尾的动词,变y为i,
再加-ed study
carry
try studied
studied
carried studied [5stQdid]
carried [5kArid]
tried [traid]
以原音字母加y结尾的词,直接加-ed play
enjoy
stay played
enjoyed
stayed played [pleid]
enjoyed [in5dVCid]
stayed [steid]
末尾只有一个辅音字母的重读闭音节词,双写该辅音字母,再加-ed stop
plan
fit stopped
planned
fitted stopped [stCpt]
planned [plAnd]
fitted [5fitid]
以-r音节结尾的词,双写r字母,
再加-ed prefer
refer preferred
referred preferred [prI`f:d]
referred [ri5fE:]
2) 不规则变化
英语中有些动词的过去式和过去分词形式变化不规则,可分为五种情况。
1.动词原形、过去式和过去分词完全同形。
例:
原形 过去式 过去分词
cut(切)
hit(打)
cast(扔)
hurt(伤害)
put(放)
let(让)
shut(关)
cost(花费)
set(放)
rid(清除) cut
hit
cast
hurt
put
let
shut
cost
set
rid cut
hit
cast
hurt
put
let
shut
cost
set
rid
2.过去式与过去分词完全同形。
例:
原形 过去式 过去分词
find(找到)
pay(支付)
leave(离开)
lend(借出)
meet(遇见)
keep(保持)
lose(丢失)
teach(教)
sit(坐)
lead(引导)
win(赢)除) found
paid
left
lent
met
kept
lost
taught
sat
led
won found
paid
left
lent
met
kept
lost
taught
sat
led
won
3.动词原形与过去分词同形
例:
原形 过去式 过去分词
come(来)
run(跑)
become(成为)......余下全文>>
二:动词过去分词与动词过去式有何不同
have done是现在完成时,did是一般过去时。
现在完成时与一般过去时的区别
现在完成时和一般过去时所表示的动作都是发生在过去,所以在实际运用中就有很多同学混淆二者的用法。现在我们就一起来看看现在完成时和一般过去时的区别。
1. 侧重点不同
现在完成时和一般过去时所表示的动作都发生在过去,但它们所强调的重点不同:现在完成时侧重于对现在的影响;而一般过去时侧重于某一动作发生在过去某个时间或某段时间,即现在完成时侧重于现在的结果,而一般过去时侧重于动作发生的时间。例如:
I have seen the film.
我看过这部电影。(现在我仍记得电影的内容)
I saw the film three days ago.
三天前我看了这部电影。(强调是三天前,而不是别的什么时候看的电影)
Mr Green has bought a new computer.
格林先生买了一台新电脑。(着重点是格林先生现在有了一台新电脑)
Mr Green bought a new computer yesterday.
格林先生昨天买了一台新电脑。(强调的是格林先生买新电脑的时间是昨天)
2. 时间状语不同
现在完成时常与already, yet, just, ever, never, before等副词以及“for+段时间”,“since+过去时间/从句”等时间状语连用;而一般过去时则常与“段时间+ago”,just now, yesterday, last week等表示过去时间的状语连用。例如:
She has lived here since two years ago.
她两年前就住在这里了。
She lived here two years ago.
两年前她住在这里。
He has been in the League for three years.
他入团已经三年了。
Tom wrote a letter to his parents last night.
昨晚汤姆给他的父母写了封信。