你说的对，感官动词和使役动词的被动语态都要加
to。
先以使役动词make为例，
the
great
news
made
her
feel
happy.
这好消息使她很高兴。变被动，she
was
made
to
feel
happy
by
the
great
news.
再以感官动词hear为例,
i
heard
her
sing
in
her
room
a
few
minutes
ago.
几分钟前我听到她在屋里唱歌了。变被动,she
was
heard
to
sing
in
her
room
a
few
minutes
ago.
to。
先以使役动词make为例，
the
great
news
made
her
feel
happy.
这好消息使她很高兴。变被动，she
was
made
to
feel
happy
by
the
great
news.
再以感官动词hear为例,
i
heard
her
sing
in
her
room
a
few
minutes
ago.
几分钟前我听到她在屋里唱歌了。变被动,she
was
heard
to
sing
in
her
room
a
few
minutes
ago.
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第1个回答 2020-03-26
感官动词和使役动词在主动句中直接加动词原形，被动句中要加to
如
I
see
him
enter
the
room.
He
is
seen
to
enter
the
room.
如
I
see
him
enter
the
room.
He
is
seen
to
enter
the
room.
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