Form negative interrogative of the simple present. Are these sentences correct?

[johnnesteixeira]

Could you say me if these sentences, written by me, are correct?

- Aren't they at the church ?

- Isn't he a doctor?

- Aren't we the his best friends?

- Isn't she an enginner?

- Isn't it your dog?

- Am I not a great friend?

Please, if any sentence is incorrect, tell me.

 

[emsr2d2]

When is your "Form negative interrogative" homework due?