英语单词的现在分词什么时候要双写末尾字母

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动词现在分词由动词原形在词尾加ing构成,其规则如下:

构成规则
一般情况下直接加ing
think---thinking
sleep---sleeping
study---studying
speak---speaking
say---saying
carry---carrying
wake---waking

以不发音的字母e结尾的单词,去掉字母e,再加ing
come---coming
make---making
leave---leaving
have---having
take---taking
以重读闭音节结尾,呈现 “辅,元,辅”结构的动词,先双写末尾的辅音字母,再加ing
stop---stopping
sit---sitting
run---running
forget---forgetting
begin---beginning
以ie结尾的动词,把ie改为y ,再加ing
die---dying
lie---lying

以重读闭音节结尾,呈现“辅,元,辅”结构的动词,先双写末尾的辅音字母,再加ing 。这类词有:bigin,cut, get,hit, run, set, sit, spit, stop, swim, beg, drop, fit, nod, dig,forget, regret, rid, 等。

travel虽然重读第一音节,词尾音节不重读,但是现在分词仍要双写末尾辅音字母,然后再加ing,如:travel---travelling.
A.动词的过去分词构成
动词的-ed形式只有一种形式,即传统语法中的过去分词。绝大部分的动词的-ed形式由动词原形加-ed构成,也有一些动词的-ed形式是不规则的。
1. 规则动词的-ed形式
limit→limited(限制)
pretend→pretended(假装)
escape→escaped(逃脱)
provide→provided(提供)
refer→referred(提交)
drag→dragged(拖)
pray→prayed(祈祷)
supply→supplied(供应)
2.不规则的:

1)AAA型(动词原形、过去式、过去分词同形)
cost(花费) cost cost
cut(割) cut cut

hit(打) hit hit
hurt 伤害) hurt hurt

let(让) let let
put(放) put put

read (读) read read

(2) AAB型(动词原形与过去式同形)

beat(跳动) beat beaten

(3) ABA型(动词原形与过去分词同形)

become(变成) became become
come(来) came come

run(跑) ran run

(4) ABB型(过去式与过去分词同形)

dig(挖) dug dug get(得到) got got

hang(吊死) hanged hanged
hang(悬挂) hung hung

hold(抓住) held held shine(照耀) shone shone

sit(坐) sat sat win (赢) won won

meet(遇见) met met keep (保持) kept kept

sleep(睡) slept slept sweep(扫) swept swept

feel(感觉) felt felt smell(闻) smelt smelt

leave(离开) left left build(建设) built built

lend(借出) lent lent send (传送) sent sent

spend(花费) spent spent lose (丢失) lost lost

burn (燃烧) burnt burnt learn(学习) learnt learnt

mean(意思是) meant meant
catch(抓住) caught caught

teach(教) taught taught bring(带来) brought brought

fight (战斗) fought fought
buy(买) bought bought

think(想) thought thought
hear (听见) heard heard

sell(卖) sold sold tell(告诉) told told

say(说) said said find(找到) found found

have/has(有) had had
make(制造) made made

stand(站) stood stood understand明白 understood understood

(5) ABC型(动词原形、过去式与过去分词三者不同形)

begin(开始) began begun
drink(喝) drank drunk

ring(铃响) rang rung sing (唱) sang sung

swim(游泳) swam swum
blow(吹) blew blown

draw(画) drew drawn
fly(飞) flew flown

grow(生长) grew grown
know(知道) knew known

throw(投掷) threw thrown
show(出示) showed shown

break(打破) broke broken
choose(选择) chose chosen

forget(忘记) forgot forgotten (forgot)
speak(说,讲) spoke spoken

wake(醒) woke woke
drive(驾驶) drove driven

eat(吃) ate eaten fall(落下) fell fallen

give(给) gave given
rise(升高) rose risen

take(取) took taken mistake(弄错) mistook mistaken

ride(骑) rode ridden write(写) wrote written

do(做) did done
go(去) went gone

lie(平躺) lay lain see(看见) saw seen

wear(穿) wore worn

be ( am, is, are )(是) was, were been

看烦了吧```这么多...
英语就是这样..
呵...多问是最好的诀窍..
祝你成功..

仅供参考 满意请采纳 谢谢
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