They are this, that
,such, same. besides “it” functions with a
demonstrative force in cases of the following type: Someone knocked at
the door. It was John.
This and
That have the category of number
,which can be called
grammatical
This-these
That-those
This/these/,that/those/,and
same are both noun and adjective
pronouns. Such is a noun-pronoun /Such is
life/ and an adjective pronoun /There had been another such moment in the
war/
