It's used when the speaker talks about a specific object that both the person speaking and the listener know.
- The car over there is fast.
- The president of the United States is giving a speech tonight.
When we speak of something or someone for the first time we use a or an, the next time we repeat that object we use the definite article the.
- I live in a house. The house is quite old and has four bedrooms.
- I ate in a Chinese restaurant. The restaurant was very good.
It's used when the speaker talks about a specific object that both the person speaking and the listener know.
- The car over there is fast.
- The president of the United States is giving a speech tonight.
When we speak of something or someone for the first time we use a or an, the next time we repeat that object we use the definite article the.
- I live in a house. The house is quite old and has four bedrooms.
- I ate in a Chinese restaurant. The restaurant was very good.