2. Singular countable nouns.
I saw an old man with a dog
To say what something is or what somebody does
She is a teacher.
I am a student
What...!
What a beautiful day!
Expressions of frequency
Twice a week
Three times a day.
3. To talk about something we already mention.
I saw an old man with a dog. The dog was barking.
When it’s clear what you are referring to.
Close the door.
When there’s only one of something
The sun
With places in town
We are going to the cinema
With superlatives
It is the most beautiful film I have ever seen
4. When we are speaking in general
I love flowers
I love the flowers in my garden
With some nouns, after at/ to / from
home, work, school, church
Ex: At home, from work
Before meals, days, and months
breakfast, lunch, Sunday, December
Before next/last + day, week, etc.
The next Sunday = wrong
The last Wednesday = wrong
The next February = wrong
