Question

passe para as formas interrogativa e negativa
there is a bookon he shef

Answer 1

Is there a book on he shef ? <--Interrogativa

There isn't a book on he shef.<-- Negativa

Para deixar a pergunta na interrogativa devemos botar o verbo "to be" antes do "There" .

Para deixar a frase na negativa devemos botar o "not" na frente do verbo "to be".

Isn't = Is not

Answer 2

I: Is there a book on he shef?
n: There isn't a book on he shef.