+256.+ We have one more class of adjectives called indefinites.
+An indefinite adjective is one that does not denote any particular
person or thing.+
All such adjectives as _each_, _every_, _either_, _neither_, _some_,
_any_, _many_, _much_, _few_, _all_, _both_, _no_, _none_, _several_ and
_certain_ are indefinite adjectives. We use them when we are not
speaking of any particular person or thing, but are speaking in a broad,
general sense and in an indefinite manner.
+257.+ The interrogative adjectives are sometimes used in this
indefinite way. They are sometimes used to modify nouns when a direct
question is not asked, and they are then used, not as interrogative
adjectives, but as indefinite adjectives. For example:
He did not know which party to join.
I have not learned what time he will go.
In these sentences _which_ and _what_ are not used to ask questions, but
are used to describe an unknown object.