Question

Complete as frases abaixo com a forma NEGATIVA de verbo there to be
A)________ a bus on the corner.
B)________ a yellow car.
C)________ many birds.
D)________four girls playing.

Answer 1

a) There isn't a bus on the corner
b) There isn't a yellow car 
c) There aren't many birds
d) There aren't four girls playing 

Answer 2

O verbo "To be" possue duas formas na conjugação: uma para o singular IS e outra para o plural ARE.

Portanto teremos "THERE IS" ou "THERE ISN'T" se o temo referido estiver no singular. E "THERE ARE" ou "THERE AREN'T" para o plural.

Com isso:
A)THERE IS NOT/THERE ISN'T a bus on the corner.
B)THERE IS NOT/ THERE ISN'T a yellow car.
C)THERE ARE NOT/THERE AREN'T many birds.
D)THERE ARE NOT/THERE AREN'T four girls playing.

As duas formas são corretas-uma é contraída(short form) e a outra não (Long form)