"be'的过去式和过去分词是什么?be (过去式) (过去分词)

问题描述:

"be'的过去式和过去分词是什么?
be (过去式) (过去分词)

am/is--was are--were
been

过去式为was(当原形为am\is):were(当原形为are) 过去分词为been

was/were
been

过去式是was\were,过去分词是been.