英语过去式和过去分词

过去式是用于物体在过去的一个时间点或时间段完成的动作，did是谓语动词。

过去分词用于完成时have / had done , 其have / had 是助词，done不是谓语或直接用于非谓语动词，表被动。
动词的过去式和过去分词有规则不规则之分，规则的一般只在动词原型后面加ed，双写的要注意双写；不规则动词要牢固记忆。

sit —— sat throw —— threw am, is —— was

drink —— drank draw —— drew are —— were

sing —— sang fly ——flew do —— did

begin —— began grow —— grew have, has —— had

swim —— swam put —— put may —— might

give —— gave cut —— cut can —— could

ring —— rang let —— let shall ——should

run —— ran read —— read will —— would

ride —— rode catch —— caught go —— went

write —— wrote teach —— taught eat —— ate

drive —— drove think —— thought hear —— heard

keep —— kept buy —— bought see —— saw

sleep —