高三英语passivevoice课件
日期：2010-05-01 05:01
助动词be 有人称，We clean the room every day
The room is cleaned every day
由“助动词（be） + 及物动词的过去分词”构成，数和时态的变化
Passive Voice
(Active voice)
(Passive voice)
be + done
被动语态
am
is
are
was
were
has
have been
am
is + being
are
had been
shall
w，
查看全部