Demonstrative: This, that, these, those.
<u>Sentence:</u> <em>That</em> is my favorite food.
Reflexive: Myself, herself, himself, yourself, ourselves, themselves.
<u>Sentence:</u> She wanted to learn how to ride a bike all by <em>herself.</em>
Intensive: Myself, herself, himself, yourself, ourselves, themselves.
<u>Sentence:</u> He <em>himself </em>wanted to bake a cake OR He wanted to back a cake <em>himself</em>.
(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. :)