Indefinite article use:
- with singular countable nouns to talk about indefinite things.
- before Mr/mrs/miss/ms when we speak about unknown person.
- instead Per
- Speak about some groups of people or things.
- instead one.
- money, fraction, measures/weight, whole number, price, time, distance/fuel, speed, illness.
- if adj before “one”
- after to be
- Mention for the first time
- instead any
- after word such, what, quite.
- set expressions
Definite article:
- unique
- names of: cinema, hotels, theatre, museums, newspaper, ships, institutions, galleries,river, seas, island, states, mountains, deserts, oceans, canals, names with of.
- Musical instruments, dances
- Names of families, nationalities ending in –sh/ch/ese
- Titles(omitted with proper names)
- Substantivization
- Superlative degree
- Most
- Beach, cinema, city, coast, country side, earth, ground, jungle, radio, pub….
- Morning, afternoon, evening, night
- Historical events
- Only, last, first
- when person is change
- with famous person.