一、原形、過(guò)去式和過(guò)去分詞的詞形和讀音都相同的單詞，結(jié)尾字母一般是t或d。如：
cut-cut-cut, hit-hit-hit, put-put-put, cost-cost-cost, let-let-let, shut-shut-shut, set-set-set, hurt-hurt-hurt, spread-spread-spread
特殊：動(dòng)詞read的過(guò)去式和過(guò)去分詞雖然詞形與原形一致，read-read-read，但發(fā)音分別是[ri:d]-[red]-[red]。
二、有些動(dòng)詞的過(guò)去分詞與原形是一樣的。如：
come-came-come, become-became-become, run-ran-run, overcome-overcame-overcome
三、有些動(dòng)詞的過(guò)去式和過(guò)去分詞相同。如：
1. 把單詞結(jié)尾的字母d改為t。如：
lend-lent-lent, spend-spent-spent, send-sent-sent
2. 改變單詞中間元音字母。如：
sit-sat-sat, win-won-won, shine-shone-shone, hold-held-held
3. 以eep結(jié)尾的動(dòng)詞，把eep改為ept。如：
keep-kept-kept, sleep-slept-slept, sweep-swept-swept
4. 過(guò)去式和過(guò)去分詞都以augh或ough結(jié)尾的動(dòng)詞。如：
buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught
5. 有的以ay結(jié)尾的動(dòng)詞，在過(guò)去式和過(guò)去分詞中把a(bǔ)y變成aid。如：
say-said-said, lay-laid-laid, pay-paid-paid
6. 另有一些其它形式的變化。如：have-had-had, learn-learnt-learnt, leave-left-left, lose-lost-lost, make-made-made, meet-met-met, feel-felt-felt
四、有些動(dòng)詞原形中含有字母i，在過(guò)去式中變i為a，在過(guò)去分詞中變i為u。
五、以字母ow或aw結(jié)尾的動(dòng)詞，在變成過(guò)去式時(shí)，通常把元音字母變成e，在變成過(guò)去分詞時(shí)，通常只在詞尾加n。如：
blow- blew- blown, draw-drew-drawn, grow-grew-grown, throw-threw-thrown, know-knew-known
cut-cut-cut, hit-hit-hit, put-put-put, cost-cost-cost, let-let-let, shut-shut-shut, set-set-set, hurt-hurt-hurt, spread-spread-spread
特殊：動(dòng)詞read的過(guò)去式和過(guò)去分詞雖然詞形與原形一致，read-read-read，但發(fā)音分別是[ri:d]-[red]-[red]。
二、有些動(dòng)詞的過(guò)去分詞與原形是一樣的。如：
come-came-come, become-became-become, run-ran-run, overcome-overcame-overcome
三、有些動(dòng)詞的過(guò)去式和過(guò)去分詞相同。如：
1. 把單詞結(jié)尾的字母d改為t。如：
lend-lent-lent, spend-spent-spent, send-sent-sent
2. 改變單詞中間元音字母。如：
sit-sat-sat, win-won-won, shine-shone-shone, hold-held-held
3. 以eep結(jié)尾的動(dòng)詞，把eep改為ept。如：
keep-kept-kept, sleep-slept-slept, sweep-swept-swept
4. 過(guò)去式和過(guò)去分詞都以augh或ough結(jié)尾的動(dòng)詞。如：
buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught
5. 有的以ay結(jié)尾的動(dòng)詞，在過(guò)去式和過(guò)去分詞中把a(bǔ)y變成aid。如：
say-said-said, lay-laid-laid, pay-paid-paid
6. 另有一些其它形式的變化。如：have-had-had, learn-learnt-learnt, leave-left-left, lose-lost-lost, make-made-made, meet-met-met, feel-felt-felt
四、有些動(dòng)詞原形中含有字母i，在過(guò)去式中變i為a，在過(guò)去分詞中變i為u。
五、以字母ow或aw結(jié)尾的動(dòng)詞，在變成過(guò)去式時(shí)，通常把元音字母變成e，在變成過(guò)去分詞時(shí)，通常只在詞尾加n。如：
blow- blew- blown, draw-drew-drawn, grow-grew-grown, throw-threw-thrown, know-knew-known