Question

what在主语从句中都有什么意思

Answer 1

作句子主语的从句叫主语从句。主语从句通常由从属连词that,whether,if和连接代词what,who,which,whatever,whoever以及连接副词how,when,where,why等词引导。that在句中无词义,只起连接作用;连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用,在从句中充当从句的成分。例如:
What
he
wants
to
tell
us
is
not
clear.
他要跟我们说什么,还不清楚。
Who
will
win
the
match
is
still
unknown.
谁能赢得这场比赛还不得而知。
It
is
known
to
us
how
he
became
a
writer.
我们都知道他是如何成为一名作家的。
Where
the
English
evening
will
be
held
has
not
yet
been
announced.
英语晚会将在哪里举行,还没有宣布。
有时为避免句子头重脚轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下:
(1)
It
+
be
+
名词
+
that从句
(2)It
+
be
+
形容词
+
that从句
(3)It
+
be
+
动词的过去分词
+
that从句
(4)It
+
不及物动词
+
that
从句
另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时,谓语动词要用虚拟语气“(should)
+do”,常用的句型有:
It
is
necessary
(important,
natural,
strange,
etc.)
that
…
It
is
a
pity
(a
shame,
no
wonder,
etc.)
that…
It
is
suggested
(requested,
proposed,
desired,
etc.)
that…