(Demonstrative Pronouns) http://www.mcwdn.org/grammar/prodemon.html
(Demonstrative, Interrogative, Indefinite, and Relative Pronouns) http://grammar.ccc.commnet.edu/grammar/pronouns1.htm
(Indefinite Pronouns) http://englishplus.com/grammar/00000027.htm
(Relative Pronouns) http://owl.english.purdue.edu/owl/resource/645/01/
(Interrogative Pronouns) http://www.englishlanguageguide.com/english/grammar/interrogative-pronoun.asp

Demonstrative Pronoun
- refer to specific one(s) of group
- words that are commonly used: this, that, these, those
Ex: Hand me that hammer. (that is describing the noun hammer)

external image hammer.gif
Ex: That is my book.

Interrogative Pronoun - introduces question
- words that are commonly used: what, which, who, whom, whose
Ex: Who is here?
knocking_at_the_door.jpg

Ex: I already told the detective what I know about it.

Relative Pronoun - introduces subordinate clause and refers to noun or pronoun outside that clause
- words that are commonly used: that, which, who, whom, whose
Ex: That is the person whom I love.
Ex: Whoever crosses the line first wins.
winner_470x350.jpg

Indefinite Pronoun - refer to one(s) not specifically named
- words that are commonly used: enough, few, fewer, less, little, many, much, several, more, most, all, both, every, each, any, either, neither, none, some
Ex: Little is expected.
Ex: Few will be chosen; fewer will finish.
Closing_Winners_Losers_tcm10-118509.jpg

Other Links:
http://www.speakwrite.net/pronoun_charts.htm
http://www.esldesk.com/vocabulary/pronouns