... for - There’s a man at the door I think the man the second time is from the garage - When there is only one - The world, the sun… - Before some collective nouns - The British, the police, the army, ... the referring to a whole group of government… people - Before some adjectives to refer to - The poor, the unemployed… the group in general - Before supelatives and ordinals - The best film, the ... to something for - There’s a man at the door the first time - In expressions for price, speed… THE - $2 a kilo, three times a day - When we are referring to a - I’ll wear the dress I bought last...