help、discower、study、live、stop、eat、play的过去式和过去分词是什么?

help -- helped
discower -- discowered
study -- studied
live -- lived
stop -- stopped
eat -- ate
play -- played

heip helped,helped
study studied studied
live lived lived
stop stopped stopped
eat ate eaten
play played played

原形 过去式 过去分词
help helped helped
discower discowered discowered
study studied studied
live lived lived
stop stopped stopped
eat ate eaten
play played played

原形 过去式 过去分词
help helped helped
discower discowered discowered
study studied studied
live lived lived
stop stopped stopped
eat ate eaten
play played played