一般现在时的被动语态为什么有两个be动词

Question

如题所述

Answer 1

主动句含有be动词变成被动语态要根据be
动词在句子中的作用来定：
1、如果be
动词是系动词，后跟名词/形容词等作表语，那么这个句子没有被动语态，
因为没有宾语。
2、如果be
动词是助动词，没有意义，只是构成某种时态时，那么它的被动语态就根据句子时态用相应结构的被动语态。如：
1).
He
is
very
happy
.
(
is
是系动词，这个句子没有被动语态）
2).
He
is
doing
his
homework
.(is
是助动词，实义动词是do，变被动语态）
His
homework
is
being
done
by
him
.
3)..
She
was
singing
an
English
song
last
night
.
(was是助动词，实义动词是sing
,
变被动语态度）
An
English
song
was
being
sung
by
her
last
night
.
4).
He
is
writing
a
letter
now
.(is
是助动词，实义动词是write
,
变被动语态）
A
letter
is
being
written
by
him
now
.
分析：被动语态的结构是：助动词be
+及物动词的过去分词。常见的用法：
1)、一般现在时的被动语态结构：am
/
is
/are
+及物动词的过去分词
2)、一般过去时的被动语态结构：was
/were
+及物动词的过去分词
3)、一般将来时的被动语态结构：will
+be
+及物动词的过去分词
4)、含有情态动词的被动语态结构：情态动词+be+及物动词的过去分词
5)、现在进行时的被动语态结构：
am/is
/
are
+being
+及物动词的过去分词
6)、过去进行时的被动语态结构：was
/
were
+being
+及物动词的过去分词如：
(1).
Chinese
is
taught
at
school.
(2).
The
river
was
cleaned
last
week.
(3).
A
new
shop
will
be
opened
next
week
.
(4).
The
heavy
box
can
be
lifted
by
him.
(5).
A
story
is
being
told
by
Uncle
Li.
(6).
The
room
was
being
cleaned
at
this
time
yesterday.