+390.+ Interjections express only emotion or feeling. They do not
express ideas. However, we have a number of words which are used
somewhat as interjections are used, which we may class as exclamatory
words, but they express more than interjections, for they express ideas
as well as emotions; but, like interjections, they are used
independently and have no part in the construction of the sentence.
+391.+ Many ordinary words and phrases are used in this way as
exclamations. When they are so used they have no place in the
construction of the sentence; that is, they do not depend upon the
sentence in which they are used, in any way. A noun used in this way is
not used as the subject or the object, but simply as an exclamation.
For example; the noun _nonsense_ may be used as an interjection, as in
the sentence; _Nonsense! I do not believe a word of it_. In this
sentence, _nonsense_ is a noun used as an interjection and plays no part
in the sentence, either as subject or object, but is an independent
construction. There are a number of words used in this way:
1. Nouns and pronouns, as _fire_, _mercy_, _shame_, _nonsense_, _the
idea_, _what_.
2. Verbs like, _help_, _look_, _see_, _listen_, _hark_, _behold_,
_begone_.