(is am are)+过去分词与(was were)+过去分词怎样区别?

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(isamare)+过去分词与(waswere)+过去分词怎样区别?(isamare)+过去分词与(waswere)+过去分词怎样区别?(isamare)+过去分词与(waswere)+过去分词怎样区

(is am are)+过去分词与(was were)+过去分词怎样区别?
(is am are)+过去分词与(was were)+过去分词怎样区别?

(is am are)+过去分词与(was were)+过去分词怎样区别?
一个是现在发生的事情,而且是被动的行为.例:now the work is done.一个是过去被动.例:the work was done the day after tomorrow.