a/an: with singular countable nouns when they are mentioned for the first time, with singular countable nouns to talk about things in general, with jobs and beliefs, the: things or people already mentioned, or when we know which things or people we are talking about, to talk about unique things, names of oceans, seas, rivers and canals, parts of the day, with superlatives and ordinal numbers, group of island, group of mountains, zero: describe something in general (with plural or uncountable nouns), with months, years, days of the week, with names of meals, with proper nouns, continents, countries, languages, sport, street, cities, towns, island, mountain ,

Articles, rules, B1

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