sings 词形变化: 形容词: singable | 动词过去式: sang/sung | 动词过去分词: sung | 动词现在分词: singing | 动词第三人称单数: sings | 同义词: but | each | apart | individually | one by one | separately | alone | one at a time | piecemeal | severally | 反义词: multiply |