do you have a lesson on "this", "that","these" and "those"? in a sentence, why and where are they placed? thanks!

Demonstratives (pronouns and adjectives)
http://sweetcoconuts.blogspot.com/2010/03/lesson-20-demonstrative-pronouns-this.html
http://sweetcoconuts.blogspot.com/2010/02/lesson-21-thisthat.html

Ask me anything