在句子中起名词作用的句子叫名词性从句
(Noun
Clauses)。
名词性从句的功能相当于名词词组,
它在复合句中能担任主语、宾语、表语、同位语、介词宾语等,因此根据它在句中不同的语法功能,名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
拿主语从句举例吧:
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。