Oraciones afirmativas con there are y there is?

Afirmativa : there is a bookthere is a windowthere is a applethere is a bananathere is a notebookthere are booksthere are windowsthere are applesthere are bananasthere are a notebooksnegativas : there isn't a bookthere isn't a windowthere isn't a applethere isn't a bananathere isn't a notebookthere aren't booksthere aren't windowsthere aren't applesthere aren't bananasthere aren't a notebooksinterrogativa : is there a lamp in my bedroom?

There is a lamp in my bedroom.

There isn't a lamp in my bedroom.

Are there pencils in the pencilcase?

There are pencils in the pencilcase.

There aren't pencils in the pencilcase.

Is there an elephant in the zoo?

There is an elephant in the zoo.

There isn't an elephant in the zoo.

Are there three girls in the pool?

There are three girls in the pool.

There aren't three girls in the pool.

Is there a laptop in your school?

There is a laptop in your school.

There isn't a laptop in your school.