is am are的一般现在时,过去式,过去分词分别是?

如题所述

一般现在时:is am are
过去式: was was were
过去分词:都是been
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第1个回答  2012-01-18
一般现在时原形是be, 单数 is ,am, 复数是are
一般现过去时是: 单数 was ,复数是were
过去分词是been.
第2个回答  2012-03-03
一般现在时:is am ,are
过去式: was ,was , were
过去分词:三个都是been
第3个回答  2012-01-18
一般现在时 is am are
过去式 was was were
过去分词 been
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