swim 过去式:swam 过去分词:swum 现在进行时:swimming 词形变化: 形容词: swimmable | 名词: swimmer | 动词过去式: swam | 动词过去分词: swum | 动词现在分词: swimming | 动词第三人称单数: swims | 词义辨析: 同义: vi.漂浮 bathe float wade