see/
hear/watch
sb.
do等变成被动语态时，需要把to还原出来，变成sb.
be
made/
be
seen/
be
heard/
be
watched
to
do.
His
workers
were
made to work
for
twelve
hours
a
day.（make
sb.
do在被动语态中变为sb.
be
made
to
do）
语态有两种：主动语态和被动语态。如果主语是动作的执行者，或者是说动作是由主语完成的，要用主动语态，如：We
speak
Chinese
in
China.在中国我们说汉语。
如果主语是动作的承受者，或者是说动作不是由主语而是由其他人完成的，则用被动语态，如：Chinese
is
spoken
by
us
in
China.在中国汉语被我们说。
扩展资料
被动语态应注意问题：
1、不及物动词无被动语态。
What
will
happen
in
100
years./The
dinosaurs
disappeared
about65
million
years
ago.
2、有些动词用主动形式表示被动意义。
This
pen
writes
well.
/This
new
book
sells
well.
3、感官动词或使役动词使用省略to的动词不定式，主动语态中不带to，但变为被动语态时，须加上to.
①makesomebody
do
something→somebody+
be
+made
to
do
something
②seesomebody
do
something→somebody
+be
+seen
to
do
something
③Theboss
made
the
little
boy
do
heavy
work.→The
little
boy
was
made
to
doheavy
work
by
the
boss.
4、如果是接双宾语的动词改为被动语态时，直接宾语（物）作主语，那么动词后要用介词，这个介词是由与其搭配的动词决定。
①Hegave
me
a
book.→A
book
was
given
to
me
by
him.
②Heshowed
me
a
ticket.→A
ticket
was
shown
to
me
by
him.
5、一些动词短语用于被动语态时，动词短语应当看作一个整体，而不能丢掉其中的介词或副词。
We
can't
laugh
at
him.
→He
can't
be
laughed
at
by
us.
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