规则动词和不规则动词过去分词的构成
英语动词的现在完成时态是由助动词have(has)+动词的过去分词构成的。（1）规则动词的过去分词和它过去式相同，即在原形后加-ed (-d)。（2）已学近100个不规则动词的过去分词约有半数也和它的过去式相同。
一、规则动词分为四类
（1）原形+ed， 如：
work worked worked visit visited visited hang（绞死）hanged hanged
（2）字尾为e时，只需加—d，如：
like liked liked live lived lived lie（撒谎）lied lied
（3）字尾为“元音字母+y”时，保留y ，直接加ed，如：
play played played stay stayed stayed
字尾为“辅音字母+y”时，将y改为i，再加ed，如：
study studied studied cry cried cried
（4）末尾只有一个辅音字母的重读闭音节时，将最后的辅音字母重复后再加ed，如：
stop stopped stopped drop（落下） dropped dropped
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1000个最常用英语单词
（1）AAA式，即与原形相同
bet（打赌）bet bet set（放置） set set cost cost cost
shut（关闭） shut shut hit（敲打） hit hit hurt（伤害） hurt hurt
let let let put put put read read[red] read [red]
beat（棍击、敲打） beat beat(en) cut cut cut
（2）ABB式
①原形中的元音字母有变化：
hang（闲逛、悬挂） hung hung lay（下蛋）laid laid dig（挖） dug dug
babysit babysat babysat feed fed fed get got got
sit sat sat win won won shine（照耀） shone shone
find found found hold held held meet met met
stand stood stood understand（理解） understood understood
②原形中的辅音字母有变化：
make made made have had had build built built
lend lent lent spend spent spent send sent sent
③在原形中后加t和d：
learn learnt learnt mean meant meant lose lost lost
hear heard heard pay paid paid say said said
④原形中的元音字母和辅音字母都有变化：
feel felt felt smell（闻） smelt smelt spell（拼写） spelt spelt
keep kept kept sleep slept slept sweep（打扫）swept swept
leave left left sell sold sold tell told told
catch（抓住） caught caught teach taught taught
buy bought bought bring brought brought
think thought thought fight(打架、打仗) fought fought
（3）ABC式
①原形中的元音字母有变化（i — a — u）
ring rang rung sing sang sung drink drank drunk
swim swam swum begin began begun sink（下沉）sank sunk
②在原形上加—en：
hide(藏) hid hidden/hid eat（吃）ate eaten fall（落下、跌倒） fell fallen
ride（骑）rode ridden write（写）wrote written be was/were been
forbid（禁止） forbade forbidden
③在过去式上加—en: forget forgot forgotten
④在原形上加—n:
see saw seen give gave given drive drove driven
take took taken mistake（误会） mistook mistaken draw（画） drew drawn
blow(吹)blew blown grow(生长、发育) grew grown know(知道)knew known
show(显示)showed shown throw（扔）threw thrown rise（升起）rose risen
⑤在过去式上加—n:
break(打破、破裂)broke broken choose(选择) chose chosen
freeze(结冰、凝固)froze frozen speak（演讲） spoke spoken
wake（醒来）woke woken
⑥与原形相同: come came come run ran run become became become
⑦原形、过去式和过去分词都不相同：
do did done go went gone fly flew flown
lie（躺） lay lain bear（出生） bore born wear（穿、戴） wore worn
