从时态看: -ed 过去式(亦有过去分词与过去式同形).如:he finished the work last night. -s 一般现在时第三人称单数.如:she likes spicy food. -ing 进行时构成部分(be doing).如:they are doing their homework at the moment. 从充当成分看: -ed (与done同形时) 非谓语,表示被动 -s 只作谓语,上述一现单数 -ing 非谓语,表示主动;动名词 这样说其实很笼统..简单列出..
