swim的过去式和过去分词过去

swim的过去式和过去分词过去式:swam，过去分词:swum，现在分词:swimming.swamswum{0}2，swim的过去式和过去分词分别是什么其实可以去一些在线字典查的....swim过去式swam/sw?m/过去分词swum/sw?m/{1}3，swim过去分词swim过去分词是swum是不规则变化swimswamswum过去分词swum现在分词swimming有不明白的地方再问哟，祝你学习进步，更上一层楼！(*^__^*)原型：swim过去式：swam过去分词：swum{2}...