Hi, for a quick reference for Tagalog - English words/phrases, you can go to the online Tagalog- English dictionary ... www.tagalog-dictionary.com

Hello xiaomon, This ,These: Both are demonstratives . There are actually 4 demonstratives: This ,these , that , those. They all refer to something stating the distance from the speaker. This and These state nouns that are closer to the speaker, 'this" for singular nouns, while "these" for plural nouns. This book is really good. These games are a lot of fun. In both cases the objects ( book , games) are close to the speaker, whereas using "that or those" instead would mean that they are far from the speaker or at least relatively far . "This book here and that magazine there". The book is near to the speaker while the magazine is far . There: It means in that place , in a place far from the speaker, it is used after a demonstrative pronoun for to stress and emphasize it "That book there " . While "here" means " in this place" and is also used after " this" as in the previous example: "This book here and that magazine there". their : "Their" is one of the possessive adjectives ,which tells who someone or something belongs to: my ,your , his,her ,its, our ,their: The Smith brought a new car .Their car is very nice. Here "their" tells that something ( the car) belongs to the Smith. I hope the difference between those words is clear now:)