This 6-page pdf lesson below is on Filipino demonstrative pronouns or panghalip na pamatlig. Included are three sets of demonstrative pronouns: (1) ito, iyan, iyon; (2) nito, niyan, niyon; and (3) dito/rito, diyan/riyan, doon/roon.
According to Paul Schachter and Fe T. Otanes in their book Tagalog Reference Grammar, these demonstrative pronouns are also called deictic pronouns. This means that the full meaning of the pronoun depends on the context in which it is used.
Choosing the appropriate Filipino pronoun for a specific situation depends on the location of the referent noun relative to the speaker and the person being addressed.
The important thing to remember about pronouns is that they are used in place of nouns or noun phrases, or they’re used to replace nouns or noun phrases. If you can use the word to replace a noun or noun phrase, then the word is a pronoun.
The problem with some of these Filipino pronouns is that they’re not always used as pronouns. Sometimes they act like adjectives or adverbs. This is the reason why I did not include the words narito, nariyan, and naroon, and ganito, ganiyan/ganyan, and ganoon. According to Filipino and English dictionaries, these words are adverbs. Some even say they’re both adjectives and adverbs. (Several webpages say these words are demonstrative pronouns.)
Even the words dito, diyan, and doon are adverbs. They are often used to replace prepositional phrases.
It’s not always easy to find a straightforward relationship between the Filipino and the English languages. The English language is not as flexible (and forgiving) as the Filipino language. Much of Filipino conversation is based on context.