sulfur
过去式:sulfured
过去分词:sulfured
现在进行时:sulfuring
词形变化:
动词过去式: sulfured/sulphured | 动词过去分词: sulfured/sulphured | 动词现在分词: sulfuring/sulphuring | 动词第三人称单数: sulfurs/sulphurs |
sulfur
过去式:sulfured
过去分词:sulfured
现在进行时:sulfuring
词形变化:
动词过去式: sulfured/sulphured | 动词过去分词: sulfured/sulphured | 动词现在分词: sulfuring/sulphuring | 动词第三人称单数: sulfurs/sulphurs |