+445.+ +Noun clauses are those which are used in place of a noun.+ They
may be used in any way in which a noun may be used, except as a
possessive.
1. +The noun clause may be used as the subject of the sentence.+ For
example:
_That he is innocent_ is admitted by all.
The clause, _that he is innocent_ is used as a _noun_, the subject of
the sentence.