yawn 名词复数:yawns 过去式:yawned 过去分词:yawned 现在进行时:yawning 词形变化: 名词: yawner | 动词过去式: yawned | 动词过去分词: yawned | 动词现在分词: yawning | 动词第三人称单数: yawns | 词义辨析: 同义参见: gape