help、discower、study、live、stop、eat、play的过去式和过去分词是什么?
问题描述:
help、discower、study、live、stop、eat、play的过去式和过去分词是什么?
答
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