第1个回答 2019-09-11
一、被动语态的用法： 1.一般现在时的被动语态构成：is
/
am
/
are
+
及物动词的过去分词 Our
classroom
is
cleaned
everyday. I
am
asked
to
study
hard. Knives
are
used
for
cutting
things. 2.一般过去时的被动语态构成：was
/
were
+
及物动词的过去分词 A
new
shop
was
built
last
year. Dinosaur
eggs
were
laid
long
long
ago. 3.现在完成时的被动语态构成：has
/
have
+
been
+
及物动词的过去分词 This
book
has
been
translated
into
many
languages. Many
man-made
satellites
have
been
sent
up
into
space
by
many
countries. 4.一般将来时的被动语态构成：will+
be
+
及物动词的过去分词 A
new
hospital
will
be
built
in
our
city. Many
more
trees
will
be
planted
next
year. 5.含有情态动词的被动语态构成：情态动词+
be
+
及物动词的过去分词 Young
trees
must
be
watered
often. Your
mistakes
should
be
corrected
right
now. The
door
may
be
locked
inside. Your
homework
can
be
handed
in
tomorrow. 6.现在进行时的被动语态构成：am
/
is
/
are
+
being
+
及物动词的过去分词 Uncle
Wang
is
mending
my
bike
now.→ My
bike
is
being
repaired
by
Tom
now. They
are
planting
trees
over
there.
→ Trees
are
being
planted
over
there
by
them. 7.不定式的被动语态：to
+
be
+
及物动词的过去分词 There
are
two
books
to
be
read.
→ There
are
twenty
more
trees
to
be
planted.