We use this or these with nouns to talk about people or things that are near us. They go before the noun.
- This coffee's cold.
- These cups are dirty.
We use that or those with nouns to talk about people or things that aren’t near us.
- That cafe's open.
- Those trees are tall.
- ‘Where are those people from?’ ‘They're from Spain.’
We use this or that with singular nouns and uncountable nouns.
- This book's exciting.
- This music's really good.
- That jacket's fantastic.
We use these or those with plural nouns.
- These apples are nice.
- I like those chocolates.