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1. 'The' is omitted before the following:
   a city, a country, [in the singular] a continent:
   Detroit, France, Europe
   [But in the plural: The Netherlands]
   Exceptions: The United Kingdom, The Hague
2. a family name in the singular: Mr White
   [But in the plural: the Whites OR: the White
   family]
3. a mountain, a lake [in the singular]: Mt
   Olympus, Lake Michigan
   [But in the plural: the Alps, the Rockies, the
   Great Lakes, etc.]
4. an island [singular]: They went to Tahiti.
   [But in the plural: The Philippines, the Canaries,
   the Falklands, etc.]
5. a meal: breakfast, lunch, dinner
   I rarely ever miss dinner.
6. a color, a game:
   Green is my favorite color. Football is my favorite
   game.
7. a language (when the word ‘language’ is not
   used):
   Is Greek difficult to learn? [BUT: Is the Greek
   language difficult to learn?]
8. a street, a square, a park:
   Maple street, Freedom Square, Central Park
9. Most magazines, periodicals:
   National Geographic, Newsweek, Car and Driver
   [BUT: The Economist]
10. a bridge, station, airport:
    Mackinaw Bridge, Kings Cross Station, Heathrow
    Airport
11. airlines, companies:
    British Airways, Swiss Air, Sony, Ford
12. illnesses, diseases: diabetes, cancer,
    hepatitis, etc.
    [But we say: (the) flu, (the) measles, (the)
    mumps]
13. a bank, store, theater, hotel or restaurant
    when it is in the genitive
    (the apostrophe before the 's' is sometimes
    omitted): [McDonald’s, Woolworth’s, Harrows]
14. a planet: Venus, Jupiter, etc.
15. a title: Doctor Smith, Professor Todd,
    President Bush, Captain Cook
16. heaven, hell, paradise:
    I can assure you that heaven and hell are real
    and do exist.
17. means of transport with the word ‘by’ before
    them:
    by car, bus, taxi, train, etc.
    [BUT: in his car, in a taxi, on the bus, on a bike]
18. the word work meaning ‘place of work’:
    She’s still at work and won't be home for some
    time.
19. percentages, fractions:
    Ten per cent of the population don't have
    internet access.
    One half of the flights were canceled due to bad
    weather.
20. a noun + number:
    Your train leaves from track 3. I’m staying in
    room 333.
    Don’t use ‘the’ before uncountable nouns,
    abstract nouns, or plurals in general statements.
    I like coffee. [NOT: …the coffee.]
    Good health is important. [NOT: The good
    health…]
    Bananas are good for you. [NOT: The bananas…]
    The IS USED before the following:
21. a hotel, movie theater, theater, gallery,
    museum:
    the Mirage (hotel), the Harbor (theater). the
    Multiplex (cinema), the Van Gogh Museum
22. a river, sea, ocean, gulf, desert:
    the Nile (River), the Red Sea, the Pacific
    (Ocean), the Sahara (Desert), the Gulf of Mexico
23. a ship, canal:
    the Titanic, the Suez Canal
24. objects considered to be unique:
    the Parthenon, the Pyramids
25. some organizations:
    the UN (The United Nations) [But if an
    abbreviation is pronounced as a word, then there
    is no article] UNICEF (United Nations International
    Children’s Fund) NATO (North Atlantic Treaty
    Organization)
26. plural nationalities ending in 'sh', 'ch' or 'ese':
    the English, the French, the Japanese [But ‘the’
    is optional with plural nationality names ending in
    's': (the) Germans, (the) Greeks, etc.
27. a singular countable noun to refer to all things
    of that type in general:
    The computer is a valuable office tool. OR: A
    computer is … OR: Computers are …

'The' is optional:
i) with seasons.
He is leaving in (the) summer.
ii) with the word TV.
I watched a movie on (the) TV.