情态动词被动语态例句

We should plant many trees on the mountains．
我们应该在山上种许多树。
Many trees should be planted on the mountains．
应该在山上种许多树。
Teenagers should be allowed to go out with their friends.
应该允许青少年和朋友外出。
The children should be allowed to go to the movies with friends on Friday nights.
孩子们应当被允许星期五晚上和朋友们一起去看电影。
Tables can be made of stone.
桌子可由石头做成。
Waste paper should not be thrown here．
废纸不应该扔在这里。
Should it be done by Li Ming?
这件事应该是李明干吗？
够了吗？？？

含情态动词的被动语态：
can\
may\
must\
should
+
be
+
动词的过去分词
The
flowers
should
be
watered
every
day.
每天应该浇花。
Cars
mustn't
be
parked
here.
这里禁止停车。
Children
can
be
taken
to
the
cinema
free
on
Children's
Day.
儿童节孩子可以免费进电影院。
Teenagers
should
be
allowed
to
go
out
with
their
friends.
　　应该允许青少年和朋友外出。
Many
trees
should
be
planted
on
the
mountains.
　　应该在山上种许多树。
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例句详解含情态动词的被动语态

sth can't(can/may/shouldn't...) be done.
应该就是这样的句式吧

It should be let down