jam 名词复数:jams 过去式:jammed 过去分词:jammed 现在进行时:jamming 词形变化: 形容词: jammable | 名词: jammer | 动词过去式: jammed | 动词过去分词: jammed | 动词现在分词: jamming | 动词第三人称单数: jams | 词义辨析: 同义: n.拥挤 crowd stuff load cram press squeeze push crush heap