was和were后面加动词的什么形式
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答：它们是be动词的过去式
一、作助动词：
1. 现在分词，构成过去进行时态：
he
was
reading.
2.
过去分词，构成被动语态：
they
were
defeated.
二、作系动词
3. 现在分词、动名词短语作表语：
the
film
was
moving.
his
job
was
teaching
english
.
4. 过去分词作表语：
we
were
moved.
5.
不定式作表语：
1）有to不定式：his
work
that
day
was
to
clean
the
blackboard.
2)
无to
不定式：what
he
should
do
is
clean
the
blackboard.
一、作助动词：
1. 现在分词，构成过去进行时态：
he
was
reading.
2.
过去分词，构成被动语态：
they
were
defeated.
二、作系动词
3. 现在分词、动名词短语作表语：
the
film
was
moving.
his
job
was
teaching
english
.
4. 过去分词作表语：
we
were
moved.
5.
不定式作表语：
1）有to不定式：his
work
that
day
was
to
clean
the
blackboard.
2)
无to
不定式：what
he
should
do
is
clean
the
blackboard.
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