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主语从句
概念及结构
在复合句中充当主语成分的从句就是主语从句，通常使用陈述语序。其结构为：引导词+主语+谓语+其它成分；但当连接代词同时充当从句主语的时候，它的结构是：连接代词+谓语+其它成分。
引导词
1.从属连词
1)that引导的主语从句既可以放在句首，也可以放在句尾。that只起连接作用，无词义，在从句中补充当成分。（that
引导的主语从句位于句首，则that不能省略；如放句尾，而句首使用了形式主语it，则that可以省略。）
eg.
That
we
are
invited
to
the
party
is
good
news
to
us.
It
is
good
news
to
us
(that)
we
are
invited
to
the
party.
2)whether
引导的主语从句既可以放句首也可以放句尾；if引导的主语从句只能放句尾，前面用it作形式主语。whether/if起连接作用，期意思为“是否”，在从句中不充当成份。
eg.
Whether
he
will
go
there
or
not
is
not
clear.
It
is
doubtful
whether/if
the
work
can
be
completed.
2.wh-类
△连接代词
(who,whom,whose,which,whoever,whomever,whichever)
△连接副词
(when,where,how,why,whenever,wherever,however)
△关系代词
(what,whatever)
连接代词在从句中充当主语，宾语，表语，定语等成份；连接副词在从句中充当时间，地点，原因，方式状语；由关系代词引导的主语从句，通常直接将主语从句放在句首。
eg.It
has
not
been
decided
yet
who
will
preside
over
the
meeting.
When
it
would
be
the
most
convenient
is
tomorrow.
they
need
is
a
good
textbook.
三.主语从句，谓语动词一般用单数。
what引导的从句做主语，表单数概念，谓语用单数；表复数概念，则用复数。
eg.What
he
said
is
true.
What
he
needs
are
books
and
water.
巩固练习
找出下列句子中的主语从句及其引导词，并指出引导词是都充当成分，充当什么成分。
That
we
shall
be
late
is
certain.
It
is
clear
that
he
will
be
our
new
Chinese
teacher.
Who
will
go
to
Beijing
is
not
clear.
What
he
did
is
not
yet
known.
How
this
happened
is
clear
now.
Whether
he
will
come
here
is
not
certain.
用适当的引导词填空。
It’s
likely
_______
he
is
the
winner
of
the
game.
________
breaks
the
law
should
be
punished.
________
he
wants
is
all
here.
________
this
happened
is
not
clear
to
anyone.
________
they
would
support
us
was
a
problem.
It
is
possible________
he
has
stolen
the
bag.
________
book
he
bought
would
be
paid
for.
It
is
still
under
discussion_________
the
old
bus
station
should
be
replaced
with
a
modern
hotel
or
not.
翻译
据说格林先生已经到北京了。
——————————————————————
你要离开，真是遗憾。
——————————————————————
我们被邀请参加今晚的音乐会，这对我们来说是个好消息。
——————————————————————
他喜欢的任何东西都会给他。
——————————————————————
物价要上涨，是肯定的。
——————————————————————
我们在哪开会都无所谓。
——————————————————————
我们应该待在哪里这是一个问题。
——————————————————————
参考答案：
略
1.that
2.
Whoever
3.
What
4.How
5.
Whether
6.
that
7.
Whichever
8.
whether
1.
It
is
said
that
Mr.Green
has
arrived
in
Beijing.
It
is
a
pity
that
you
are
leaving.
That
we
are
invited
to
the
concert
this
evening
is
good
news
to
us.
Whatever
he
likes
will
be
given
to
him.
That
the
princes
will
go
up
is
certain.
It
is
no
difference
where
we
shall
have
the
meeting.
Where
we
should
stay
is
the
problem.
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主语从句
新知导入
一.
概念及结构
在复合句中充当主语成分的从句就是主语从句，通常使用陈述语序。其结构为：引导词+主语+谓语+其它成分；但当连接代词同时充当从句主语的时候，它的结构是：连接代词+谓语+其它成分。
新知讲解
一.
引导词
1.从属连词
1)that引导的主语从句既可以放在句首，也可以放在句尾。that只起连接作用，无词义，在从句中补充当成分。（that
引导的主语从句位于句首，则that不能省略；如放句尾，而句首使用了形式主语it，则that可以省略。）
eg.
That
we
are
invited
to
the
party
is
good
news
to
us.
It
is
good
news
to
us
(that)
we
are
invited
to
the
party.
新知讲解
2)whether
引导的主语从句既可以放句首也可以放句尾；if引导的主语从句只能放句尾，前面用it作形式主语。whether/if起连接作用，期意思为“是否”，在从句中不充当成份。
eg.
Whether
he
will
go
there
or
not
is
not
clear.
It
is
doubtful
whether/if
the
work
can
be
completed.
新知讲解
2.wh-类
△连接代词
(who,whom,whose,which,whoever,whomever,whichever)
△连接副词
(when,where,how,why,whenever,wherever,however)
△关系代词
(what,whatever)
连接代词在从句中充当主语，宾语，表语，定语等成份；连接副词在从句中充当时间，地点，原因，方式状语；由关系代词引导的主语从句，通常直接将主语从句放在句首。
新知讲解
eg.It
has
not
been
decided
yet
who
will
preside
over
the
meeting.
When
it
would
be
the
most
convenient
is
tomorrow.
What
they
need
is
a
good
textbook.
新知讲解
三.主语从句，谓语动词一般用单数。
what引导的从句做主语，表单数概念，谓语用单数；表复数概念，则用复数。
eg.What
he
said
is
true.
What
he
needs
are
books
and
water.
课堂练习
一．找出下列句子中的主语从句及其引导词，并指出引导词是都充当成分，
充当什么成分。
1.
That
we
shall
be
late
is
certain.
2.
It
is
clear
that
he
will
be
our
new
Chinese
teacher.
3.
Who
will
go
to
Beijing
is
not
clear.
4.
What
he
did
is
not
yet
known.
5.
How
this
happened
is
clear
now.
6.
Whether
he
will
come
here
is
not
certain.
课堂练习
一．用适当的引导词填空。
1.
It’s
likely
_______
he
is
the
winner
of
the
game.
2.
________
breaks
the
law
should
be
punished.
3.
________
he
wants
is
all
here.
4.
________
this
happened
is
not
clear
to
anyone.
5.
________
they
would
support
us
was
a
problem.
6.
It
is
possible________
he
has
stolen
the
bag.
7.
________
book
he
bought
would
be
paid
for.
8.
It
is
still
under
discussion_________
the
old
bus
station
should
be
replaced
with
a
modern
hotel
or
not.
that
Whoever
What
How
Whether
that
Whichever
whether
课堂练习
一．翻译
1.
据说格林先生已经到北京了。
2.你要离开，真是遗憾。
3.我们被邀请参加今晚的音乐会，这对我们来说是个好消息。
It
is
said
that
Mr.Green
has
arrived
in
Beijing.
It
is
a
pity
that
you
are
leaving.
That
we
are
invited
to
the
concert
this
evening
is
good
news
to
us.
课堂练习
4.
他喜欢的任何东西都会给
5.
物价要上涨，是肯定的。
6.
我们在哪开会都无所谓。
7.
我们应该待在哪里这是一个问题。
Whatever
he
likes
will
be
given
to
him.
That
the
princes
will
go
up
is
certain.
It
is
no
difference
where
we
shall
have
the
meeting.
Where
we
should
stay
is
the
problem.
课堂总结
主语从句
that
一般不省略
whether/if
是否
放句首常用whether
连接代、副词
注意语序要用陈述句语序
what或wh-ever等
注意语序要用陈述句语序
作业布置
做课本和练习册相对应的练习。
谢谢
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