am\are\is was\were been 分别是什么时态?

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$am\are\is was\were been 分别是什么时态?$

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am\are\is was\were been 分别是什么时态?
am\are\is was\were been 分别是什么时态?

am\are\is was\were been 分别是什么时态?
am is are 一般现在时
was were 一般过去时
been 过去分词 ,通常用于完成时态中,如：have / has been