Написать предложения, используя полную и краткую отрицательную форму: 1. it is a big dog. 2. he is our teacher. 3. they are friends. 4. you are small. 5. i am nine.

1. It is not a big dog
It isn't a big dog
2. He is not our teacher
He isn't our teacher
3.They are not friends
They aren't friends
4.You are not small
You aren't small
5. I'm not nine(только полная форма)