swim(现在分词)
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swim(现在分词)swim(现在分词)swim(现在分词)swumswimmingswimming过去式swam过去分词swumswimming前面两个人说的是过去分词分词包括现在分词和过去分词sw
swim(现在分词)
swim(现在分词)
swim(现在分词)
swum
swimming
swimming
过去式swam
过去分词swum
swimming
前面两个人说的是过去分词
分词包括现在分词和过去分词
swimming
解析：swim，元音字母+辅音字母结尾，双写辅音字母+ing
swim
现在进行时:swimming
过去式:swam
过去式:swum
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swimming