x 名词复数:xs, x's 词形变化: 名词复数: x's | 动词过去式: x'd/X'd | 动词过去分词: x'd/X'd | 动词现在分词: x'ing/X'ing | 动词第三人称单数: x's/X's | 词义辨析: 同义参见: unknown