求一些英文动词原形，及过去式

常见的不规则动词有：
am/is—was are—were become—became begin—began
bring—brought catch—caught come—came do—did
eat—ate feel—felt find—found get—got give—gave
go—went grow—grew have/has—had hear—heard know—knew
make—made put—put run—ran say—said see—saw
sit—sat stand—stood take—took teach—taught
tell—told write—wrote

为了帮助同学们记住不规则动词，现在把教材中出现的不规则动词分为几个类型，每个类型中又分若干组，尽量找出每组中各词变化形式的共同点，以帮助记忆。
1. 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
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）