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用法都一樣,第一人稱,助動詞用do,be動詞用am,第二人稱,助動詞用do,be動詞用are,第三人稱,助動詞用does,be動詞用is,複數,助動詞用do,be動詞用are,過去式,助動詞用did,be動詞用was/ were
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