stand的过去式，过去分词和现在分词是什么 Stood stood standing
stand的过去式和过去分词是什么？ stand—stood（过去式）stand—stood（过去分词）
slip hurt stand catch的现在分词，过去式与过去分词 动词 现在分词 过去式 过去分词slip slipping slipped slippedhurt hurting hurt hurtstand standing stood stoodcatch catching caught caught
