Escribe la forma afirmativa , negativa e interrogativa que hacen falta en la tabla ......↓

Respuesta:
There are three girls in the class. (+)
There aren't three girls in the class (-)
Are there three girls in class? (?)
There is not a ball on the floor. (-)
There is a ball on the floor. (+)
Is there a ball on the floor? (?)
Are there two boys in the class? (?)
There are two boys in the class. (+)
There aren't two boys in the class. (-)
There isn't a blackboard in the class. (-)
There is a blackboard in the class. (+)
Is there a blackboard in the class? (?)
:]