被动语态的基本结构和用法

如题所述

第1个回答  2020-03-03

一般式(一般现在,一般过去,一般将来):am,
is,
are,
was,
were,
is
going
to
be
,
will
be+done.ie.
Once
environmental
damage
is
done,
it
takes
many
years
for
the
system
to
recover.
本句的意思是:“环境一旦遭到破坏,需要多年时间才能恢复过来。”do作为及物动词有“引起,产生”的含义,do
damage的意思是“造成破坏”。主语damage是及物动词do的动作对象,谓语应当用被动语态。同样的,还有,I
will
mend
the
machine.相当于The
machine
will
be
mended
(by
me).
  ②
进行时(现在进行、过去进行、将来进行):be+being+P.P.
ie.The
classroom
is
being
cleaned.
  ③
完成时(现在完成、过去完成、将来完成):have/has
been
+
P.P.:例如The
machine
will
have
been
repaired
by
3
o’clock
this
afternoon.再如:My
homework
has
been
finished.
  ④
其他时态依词类推,可得到结果。
  ⑤
情态动词的被动语态:主语
+
情态动词
+
be动词
+
动词过去分词,例如Your
teeth
must
be
brushed.
  ⑥
不定式的被动语态:to
be
done例:The
no-shows
have
to
be
considered
when
deciding
the
rate
of
overbooking.(确定超过接待能力的预定时必须考虑预定了房间却来不了的客人。)
相似回答