动词的过去式不随人称或单复数变化：
I lived
You lived
He / she / it lived
We lived
They lived

规则变化的动词，动词原形后面加 -d 或 -ed 变成过去式。
单词本身e结尾，就加-d，不是e结尾，就加-ed：
live - lived

work - worked

I worked
you worked
he / she / it worked
we worked
they worked

其他变化

如果动词结尾是一个元音加一个辅音，双写最后的辅音再加-ed：
stop - stopped 停止，中断（The bus stopped suddenly. 公共汽车突然停下来。）
plan - planned 计划，打算，规划（Who planned this trip? 谁计划的这次旅行？）
hug - hugged 拥抱
ship - shipped 运输，运送
admit - admitted 承认

如果动词结尾是一个辅音加-y，把 -y 变成 -i 再加-ed：
study - studied (study一般现在时第三人称单数studies)
hurry - hurried 加快，催促，匆忙
carry - carried 背，抱，扛，抬，运送，输送，传输，携带，带有，带着

在英国英语里，如果动词结尾是一个元音加一个l，双写l再加-ed：
*美国英语不双写l
travel - travelled[英]/traveled[美] 旅行，旅游，游历
cancel - cancelled[英]/canceled[美] 取消，注销