Respostas

2014-08-17T15:22:15-03:00
AFIRMATIVA: There is a police station next here.
NEGATIVA: There isn't a police station next here.
INTERROGATIVA: Is there a police station next here?

There is (Há, existe) = Singular
There are (Há, existem) = Plural

OBS:
¹Na forma negativa acrescenta-se a partícula NOT (Isn't é a contração de Is + NOT)
²Na forma interrogativa o verbo (is) vai para o início da frase.

1 4 1
2014-08-17T16:48:28-03:00
Afirmativa : there is an apple on the table.

negativa : there isn't an apple on the table.

interrogativa : is there an apple on the table?