英语动词怎样改原形?

不规则动词表

A---A---A型（现在式、过去式和过去分词同形）
动词原形（现在式） 过去式 过去分词
cost cost cost 花费
cut cut cut 割,切
hit hit hit 打
let let let 让
put put put 放下
read read read 读
hurt hurt hurt 伤
2. A---A---B型（现在式和过去式同形）
beat beat beaten 打
3. A---B---A型（现在式和过去分词同形）
come came come 来
become became become 变
run ran run 跑
overcome overcame overcome征服,打败,克服
4. A ---B ---B型
（1）在动词原形后加一个辅音字母d或t构成过去式或过去分词.
burn burnt burnt 燃烧
learn learned/learnt learned/learnt 学习
mean meant meant 意思
hear heard heard 听见
（2）把动词原形的最后一个辅音字母“d”改为“t” 构成过去式或过去分词.
build built built 建筑
lend lent lent 借给
lose lost lost 失去
send sent sent 送
spend spent spent 花费
（3）其他
pay paid paid 付
lay laid laid 下蛋
say said said 说
bring brought brought 带来
buy bought bought 买
think thought thought 想
sleep slept slept 睡
keep kept kept 保持
sweep swept swept 扫
stand stood stood 站
understand understood understood 明白
win won won 得胜
shine shone/shined shone/shined 发光
catch caught caught 抓住
teach taught taught 教
feel felt felt 觉得
fight fought fought 战斗
find found found 发现
get got got 得到
hang hanged/ hung hanged/ hung 绞死,挂
have had had 有
hold held held 盛,握
leave left left 离开
make made made 制造
meet met met 遇见
sell sold sold 卖
shoot shot shot 射击
tell told told 告诉
smell smelt/smelled smelt/smelled 嗅,闻
sit sat sat 坐
dig dug dug 挖
5. A---B---C型（现在式、过去式和过去分词都不相同）
（1）在动词原形后加-n或-en构成过去分词.
eat ate eaten 吃
fall fell fallen 落下
steal stole stolen 偷
give gave given 给
freeze froze frozen 冻结
take took taken 拿
see saw seen 看见
write wrote written 写
ride rode ridden 骑
drive drove driven 驾驶
throw threw thrown 抛,扔
blow blew blown 吹
grow grew grown 生长
know knew known 知道
fly flew flown 飞
draw drew drawn 拉,绘画
show showed shown 展示
（2）过去式加-n或-en构成过去分词.
speak spoke spoken 说话
break broke broken 破碎,折断
wake waked/ woke waked/ waken 醒
choose chose chosen 选择
forget forgot forgotten 忘记
（3）变单词在重读音节中的元音字母“i”分别为“a”（过去式）和“u”（过去分词）.
begin began begun 开始
ring rang rung 按铃
sing sang sung 唱
sink sank sunk 沉
swim swam swum 游泳
drink drank drunk 饮
（4）其他不规则动词的变化.
be(am, is) was/ were been 是
be(are) were been 是
do did done 做
go went gone 去
lie lay lain 躺
wear wore worn 穿

不规则动词巧记法
英语动词按其过去式和过去分词的构成方式可分为规则动词和不规则动词.规则动词的过去式和过去分词由词尾加ed构成,而不规则动词的变化因词而异.但如对不规则动词的过去式和过去分词做一分析,就可发现其中的“规则”.为方便同学们记忆,现将初中英语教学大纲中的69个不规则动词的原形、过去式和过去分词列出并规为五种类型.同学们还可将第二、三类分为若干组,以便准确记忆.
一、AAA型（原形、过去式和过去分词同形）：
cost cost cost cut cut cut
let let let put put put
read read read
二、ABB型（过去式与过去分词同形）：
bring brought brought
build built built
buy bought bought
catch caught caught
dig dug dug
feel felt felt
find found found
get got got
have had had
hear heard heard
hold held held
keep kept kept
※learn learnt learnt
leave left left
lend lent lent
make made made
meet met met
pay paid paid
say said said
sell sold sold
send sent sent
shine shone shone
sit sat sat
sleep slept slept
※smell smelt smelt
spend spent spent
stand stood stood
teach taught taught
tell told told
think thought thought
understand understood
understood
三、ABC型（原形、过去式和过去分词各异）：
be waswere been
begin began begun
blow blew blown
break broke broken
do did done
draw drew drawn
drink drank drunk
drive drove driven
eat ate eaten
fall fell fallen
fly flew flown
forget forgot forgotten
give gave given
go went gone
grow grew grown
know knew known
lie lay lain
ride rode ridden
ring rang rung
see saw seen
show showed shown
sing sang sung
speak spoke spoken
swim swam swum
take took taken
throw threw thrown
wake woke woken
wear wore worn
write wrote written
四、ABA型（原形与过去分词同形）：
become became become
come came come
五、AAB型（原形与过去式同形）：
beat beat beaten
（注：带※号的词也可视为规则动词.）
．不规则动词的词形变化
定义 动词由原形转变为过去式和过去分词时不按词尾加“-ed”之变化规则者叫做不规则动词（Irregular Verbs）.
现代英语新生成的动词都归入“-ed”的规则变化,例如：
park→parked （停车——1864）
fax→faxed （以传真传送——1979）
e-mail→e-mailed （以电脑网络传送——1982）
（所附年次为最早用例出现年次——O.E.D.）
因此,不规则动词可以说都是古英语动词的不规则变化因其常用度很高而一直沿用到今天者,所以我们今天在学习英语时绝对无法,也不可能规避这些不规则动词.
从英语的演变来看,不规则动词就是强势动词（Strong
Verbs）——即其词形变化全依其本身之语音（尤其是元音）变化来进行而不借助词尾的变化.例如：
原形： buy sing speak
过去式： bought sang spoke
过去分词： bought sung spoken
而每一型式的变化都有其类群,例如：
buy bought bought （买）
bring brought brought （带来）
fight fought fought （作战）
think thought thought （想）
sing sang sung （唱）
drink drank drunk （喝）
swim swam swum （游泳）
begin began begun （开始）
speak spoke spoken （说）
break broke broken （打破）
steal stole stolen （偷）
freeze froze frozen （冷冻）
因此我们学习不规则动词的时候,最有效的方法就是要针对这种词形变化的现象,了解其变化的型式,发出声音背念,使其能自然地隔入我们的speaking和writing,这样才能说确实地把不规则动词学会了.
注：与强势动词相对,须借助“-ed”之词尾来进行词形变化的规则动词就叫做弱势动词（Weak Verbs）.

不规则动词的类别
每个学习英语的人都会在不同阶段或多或少碰到不规则动词所带来的麻烦,特别是在形态拼写方面.
不规则动词里是不是杂乱无序的动词呢?当然不是；实际上是乱中有序、有条不紊的.
首先,不规则动词是针对规则动词而言.
大家知道,规则动词（regular verbs）的过去式（the past form）和过去分词（the past
participle）都一样的要加上“ -ed/-d”,如：
①a. Jason worked until five o'clock（过去式）
b. Have you worked late?（过去分词）
②a. Xiao Lin decided to go abroad（过去式）
b. Has his wife decided to join him ?（过去分词）
不规则动词则不然；它们的过去式和过去分词并不一致,学习时要集中精神,一一加以辨别,才可避免错误.
语法学家根据动词“原形、过去式、过去分词”三形式上的变化,把不规则动词划分为下列类别：
一三种形式都相同
第一类的包括下列这些常见动词：
① cut-cut-cut ; ② hurt-hurt-hurt ; ③ put-put-put; ④ shut-shut-shut; ⑤
cost-cost-cost; ⑥burst-burst-burst; ⑦ hit-hit-hit; ⑧ cast-cast-cast; ⑨
set-set-set; ⑩ let-let-let.
例如：
⑴a. Don't go on blowing the balloon! It will burst.
b. One of his car tyres had a nail and it burst.
c. The dog has burst free and ran away.
二其中两种形式相同
第二类可分为十一小类；下面是其中常见的四种：
① bind-bound-bound; find-found-found
② bring-brought-brought;
think-thought-thought
③ dig-dug-dug; strike-struck-struck
④ bend-bent-bent; build-built-built
例如：
⑵a. You have to bend your head when you bow.
b The mechanic bent the wire and broke it.
c. Here come the woman bent down with age.
三三种形式都不同
第三类可再分为八小类,如下：
① take-took-taken; shake-shook-shaken
② hide-hid-hidden; bite-bit-bitten
③ tear-tore-torn; bear-bore-born/ borne
④ choose-chose-chosen;
speak-spoke-spoken
⑤ know-knew-known; blow-blew-blown
⑥ write-wrote-written; drive-drove-driven
⑦ drink-drank-drunk; begin-began-begun
⑧ show-showed-showed/shown;
swell-swelled/swollen
例如：
⑶a. Can you write down your name?
b. I wrote it there, didn't I?
c. Have you written to John, who is now in New York?
上述例子证明不规则动词的确比规则动词麻烦得多.莫怪有人说,英语动词是所有词类中,最难应付的一种.这话很中肯,毫不夸张.幸好,不规则动词也有迹可寻；就让我们“步步追踪”吧!
不规则变化动词的过去式：： (第二册第七课)Q & A 集锦康轩版相关课程翰林版相关课程
除了 be 外,动词中,其过去式呈不规则变化者,从第一册到本课,计有：
原形动词-过去式 原形动词-过去式
do-did draw-drew
drive-drove cut-cut
come-came eat-ate
fight-fought find-found
get-got give-gave
go-went have-had
hide-hid make-made
put-put read-read [rεd]
ring-rang run-run
say-said see-saw
shine-shone sing-sang
speak-spoke swim-swam
take-took tell-told
write-wrote feel-felt
hear-heard
这种不规则变化动词,因为是呈现不规则变化,故只能看到一个就记一个,无其他办法,但重要的是,要背得滚瓜烂熟.