Question

3) Complete as sentenças a seguir com AREN’T ou ISN’T: a) Peter .................. American. b) Mary .................. in the office. c) He .................. sad. d) We .................. in New York. e) The car .................. in the garage. f) She .................. a teacher. g) He .................. a doctor. h) She .................. at home. i) He .................. actor. j) The dog .................. in the garden. k) You .................. very happy. l) They .................. in Brazil.​

Answer 1

Regra geral:

Is/ Isn't (is not) = singular

Are/ Aren't (are not) = plural

Portanto:

a) Peter isn't American.

b) Mary isn't in the office.

c) He isn't sad.

d) We aren't in New York.

e) The car isn't in the garage.

f) She isn't a teacher.

g) He isn't a doctor.

h) She isn't at home.

i) He isn't an actor.

j) The dog isn't in the garden.

k) You aren't very happy.

l) They aren't in Brazil.

* Exceção: o pronome you (você/vocês), mesmo estando no singular, é seguido por are/aren't.

Espero ter ajudado!