Demonstrative: This, that, these, those.
Sentence: That is my favorite food.
Reflexive: Myself, herself, himself, yourself, ourselves, themselves.
Sentence: She wanted to learn how to ride a bike all by herself.
Intensive: Myself, herself, himself, yourself, ourselves, themselves.
Sentence: He himself wanted to bake a cake OR He wanted to back a cake himself.
(A reflexive pronoun reflects back on the subject of the sentence while an intensive pronoun adds emphasis or intensity to a noun.)
Hope this helps, best of luck to you. :)