demonstrate  (verb): to show; to indicate; to point to

A demonstrative pronoun represents a thing or things:

  • near in distance or time (this,¬†these)
  • far in distance or time (that,¬†those)
¬†near ‚ÄĘfar ‚áí
singular ?thisthat
plural ???thesethose

Here are some examples with demonstrative pronouns, followed by an illustration:

  • This ¬†tastes good.
  • Have you seen¬†this?
  • These ¬†are bad times.
  • Do you like¬†these?

  • That ¬†is beautiful.
  • Look at¬†that!
  • Those ¬†were the days!
  • Can you see¬†those?

  • This ¬†is heavier than¬†that.
  • These ¬†are bigger than¬†those.
Do not confuse demonstrative pronouns with demonstrative adjectives. They are identical, but a demonstrative pronoun stands alone, while a demonstrative adjective qualifies a noun.
  • That ¬†smells. (demonstrative pronoun)
  • That book¬†is good. (demonstrative adjective + noun)

Normally we use demonstrative pronouns for things only. But we can use them for people when the person is identified. Look at these examples:

  • This ¬†is Josef speaking. Is¬†that¬†Mary?
  • That ¬†sounds like John.

sources : Original Link