. 不规则动词过去式和过去分词变化
1。A———A—--A型（现在式、过去式和过去分词同形）
| 现在式 | 过去式 | 过去分词 | 词义 |
| cost | cost | cost | 花费 |
| cut | cut | cut | 割，切 |
| hit | hit | hit | 打 |
| let | let | let | 让 |
| put | put | put | 放 |
| read | read | read | 读 |
| hurt | hurt | hurt | 受伤 |
2. A-——A-——B型（现在式和过去式同形）
| 现在式 | 过去式 | 过去分词 | 词义 |
| beat | beat | beaten | 打败 |
3. A-——B—--A型(现在式和过去分词同形）
| 现在式 | 过去式 | 过去分词 | 词义 |
| come | came | come | 来 |
| become | became | become | 变 |
| run | ran | run | 跑 |
4。 A --—B —-—B型
（1）“V-原形+d/t” 构成过去式或过去分词。
| 现在式 | 过去式 | 过去分词 | 词义 |
| burn | burnt | burnt | 燃烧 |
| learn | learnt/learned | learnt/learned | 学习 |
| mean | meant | meant | 意思 |
| hear | heard | heard | 听见 |
（2）把 V-原形的末尾“d”改为“t” 构成过去式或过去分词。
| 现在式 | 过去式 | 过去分词 | 词义 |
| build | built | built | 建筑 |
| lend | lent | lent | 借给 |
| send | sent | sent | 送,寄 |
| spend | spent | spent | 花费 |
| lose | lost | lost | 失去 |
（3）其他
| 原型 | 过去式 | 过去分词 | 词义 |
| pay | paid | paid | 付 |
| lay | laid | laid | 下蛋 |
| say | said | said | 说 |
| | | |
| 现在式 | 过去式 | 过去分词 | 词义 |
| 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 | 打扫 |
| | | |
| stand | stood | stood | 站 |
| understand | understood | understood | 明白 |
| | | |
| win | won | won | 得胜；赢 |
| shine | shone/shined | shone/shined | 发光 |
| | | |
| catch | caught | caught | 抓住 |
| teach | taught | taught | 教 |
| feel | felt | felt | 感觉 |
| fight | fought | fought | 战斗 |
| find | found | found | 发现 |
| get | got | got | 得到 |
| hang | hung/hanged | hung/hanged | 绞死，挂 |
| 现在式 | 过去式 | 过去分词 | 词义 |
| have | had | had | 有 |
| hold | held | held | 盛，握 |
| leave | left | left | 离开，留下 |
| make | made | made | 制造 |
| meet | met | met | 遇见 |
| shoot | shot | shot | 射击 |
| sell | sold | sold | 卖 |
| 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“V-原形+ n/ en”构成过去分词.
| 现在式 | 过去式 | 过去分词 | 词义 |
| 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 |
| 现在式 | 过去式 | 过去分词 | 词义 |
| 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 |
(2）过去式 + n/en 构成过去分词。
| 现在式 | 过去式 | 过去分词 | 词义 |
| speak | spoke | spoken | 说话 |
| break | broke | broken | 破碎,折断 |
(3）变重读音节中的元音字母“i”分别为“a”(过去式）和“u”（过去分词）.
| 现在式 | 过去式 | 过去分词 | 词义 |
| begin | began | begun | 开始 |
| ring | rang | rung | 按铃 |
| sing | sang | sung | 唱 |
| sink | sank | sunk | 沉没 |
| swim | swam | swum | 游泳 |
| drink | drank | drunk | |
（4）其他不规则动词的变化。
| 现在式 | 过去式 | 过去分词 | 词义 |
| 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 |
