open live sit study call的现在分词、第三人称单数形式、过去式各是什么？求啊

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open live sit study call
现闭粗嫌凳扰在分词openning living sitting studying calling
三单形式opens lives sits studies calls
过轿手去式 opens lived sitted studied callde

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call的过去式是called

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opens opened
lives lived
sits sat
calls called

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