be
动词是时态是过去时,was
,后接动词如果是被动语态的话,后接动词加ed
如,this
book
was
written
by
me.
此句中be动词由于时态是过去时,为was,而书是被写的,被动语态,则
written
谓语动词有行为动词,系动词,情态动词和助动词,行为动词包括及物动词和不及物动词。
be谓语动词中的系动词
do是其中的助动词
后面接动词原形,did
you
go
swim
yesterday?
can
等等是
情态动词
后接原形
can
you
swim?
行为动词
有被动与主动之分
i
went
for
a
walk
this
morning.
至于你的第三个问题,我没有看明白。能否举例具体说明下?
贴下此贴,
http://baike.baidu.com/view/330413.htm?fr=ala0_1