Oraciones del verbo to - be afirmativas, negativas, interrogativas?

Afirmativas : - He is a soccer player, He won a prize last year.

- She is singer, she has a big band called "The Pinks" - You are a beutiful girl, I want to have a date with you.

- They are students, They live near here.

- We are co - workers, We work in "Forever 21"

Negativas : - He isn't a doctor because he works in a market.

- She isn't in her house.

- I am not singer because I don't like to sing.

- They aren't teachers because They work as soccer players.

- We aren't dancers.

Interrogativas : - Is she a doctor or dancer?

- Is he Mario or Julio?

- Is it a fantastic car?

- Are they students from USA?

- Are we co - workers?