scum 过去式:scummed 过去分词:scummed 现在进行时:scumming 词形变化: 形容词: scummy | 副词: scummily | 名词: scummer | 动词过去式: scummed | 动词过去分词: scummed | 动词现在分词: scumming | 动词第三人称单数: scums | 词义辨析: 同义参见: sheet cattle