names of theatres, cinemas, hotels, galleries and museums
with phrases like: at home/at work, go home/to bed/to work, next/last (week, month, etc.)
when it's clear who or what somebody is
when you mention something for the first time
when you say what somebody or something is
with general singular nouns
roads, streets, parks, bridges, shops and restaurants
with specific nouns
individual mountains and lakes
with buildings in a town
with prison, church, school, hospital, university if you're thinking about the institution and its purpose
with general plural or uncountable nouns
most countries, continents, regions, states, islands, provinces, towns, cities
mountain ranges, rivers, seas, canals, deserts, and island groups
when there's only one of something
