第1个回答 2012-07-08
am/is/are 2.一般过去时 was/were 3.一般将来时 will/shall be 4.过去will/shall be being 8.现在完成时 have/has +been 9.过去完成 had +
第2个回答 2012-07-08
这个要的是平时的注意与总结;
一般式:is,am.are
过去式:was,were,
完成式:havebeen,hasbeen
现在进行时:bedoing
过去进行时:was/weredong
过去完成进行时:had been doing
第3个回答 2012-07-08
am is are was were been being be 没了吧。
第4个回答 2012-07-08
be
is/are
were/was
been
being