a
1
used when we want to talk about a person or thing for the first time or when other people may not know who or what they are
- She bought a new book yesterday.
- She found a job at a company downtown.
- She wants to be a doctor when she grows up.
- There is a movie theater in the mall.
- They were excited to see a shooting star in the sky.
2
used to show someone or something belongs to a group or type
- He is a member of a sports club.
- He is a student in the university.
- She is using a computer to complete the task.
- The lion is a wild animal.
- The rose is a flower with beautiful petals.