1. THE
1.1. Plural or uncountable nouns
1.1.1. The earth
1.1.2. The sky
1.2. If the topic is new
1.2.1. What did you think of the people in Spain.
1.2.2. She didn’t like the music.
1.3. If something is the only one
1.3.1. Did you like the bread my mother gave you?
1.3.2. She didn’t like the music.
1.4. If we are taling about thinks (general/particular)
1.4.1. The kids are in the park.
1.4.2. I bougth this CD in the shop center.
2. A/AN
2.1. Singular countable nouns
2.1.1. A cat
2.1.2. An egg
3. NO ARTICLE
3.1. In phrases about meals
3.1.1. the breakfast
3.1.2. the tea
3.2. In some fixed phrases about routines
3.2.1. go to the university
3.2.2. be at the home.
3.3. To talk about most countries, cities, streets, etc
3.3.1. the Latacunga
3.3.2. the Ecuador
4. OTHER USES OF THE
4.1. When te noun is definied by a defining relative clause
4.1.1. They’re the people who want to buy our house.
4.1.2. The hospital where I was born is being knocked down.
4.2. Before superlatives
4.2.1. The biggest
4.2.2. The most interesting
4.3. Certain countries, oceans, rivers or groups of islands
4.3.1. the Sahara
4.3.2. the Indian Ocean
4.4. Some fixed expressions
4.4.1. Time
4.4.1.1. In the morning.
4.4.1.2. At the moment.
4.4.2. Places or seasons
4.4.2.1. In the winter.
4.4.2.2. In the city.
4.4.3. Free-time activities
4.4.3.1. Go to the park.
4.4.3.2. To climb the mountain.
5. OTHER USES OF A /AN
5.1. Describe something
5.1.1. There are a few kids in the park.
5.1.2. There’s a water fountain in the park.
5.2. Say what job someone has
5.2.1. They 're a firefighters.
5.2.2. I'm a nurse.
5.3. In some frequency expressions
5.3.1. I play soccer twice a week.
5.3.2. I see them three times a year.