Learn English: Deomonstratives this that / one ones- Basic English grammar

This English grammar lesson explains how to use demonstratives like this that these those one and ones. The explanation is given in clear slow easy to understand English. ( Grammar Practice exercises are done at normal pace) Here is a link to the page with more illustrations and information.
http://www.improveenglishesl.com/beginner_demonstrative_pronoun_how_to.html