1、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---
2、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 learned/learnt /learnt学习mean meant meant意思hear heard heard听见（2）把动词原形的最后一个辅音字母“d”改为“t”构成过去式或过去分词。build built built建筑lend lent lent借给lose lost lost失去send sent sent送spend spent sp
3、ent花费（3）其他pay paid paid付lay laid laid下蛋say said said说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扫stand stood stood站understand understood understood明白win won won得胜shine
4、 shone/shined shone/shined发光catch caught caught抓住teach taught taught教feel felt felt觉得fight fought fought战斗find found found发现get got gotten得到hang hanged/hung hanged/hung绞死，挂have had had有hold held held盛，握leave left
5、 left离开make made made制造meet met met遇见sell sold sold卖shoot shot shot射击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）在动词原形后加-n或-en构成过去分词。eat
6、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kno
