Question

4) Marque abaixo as frases que estão no Present Perfect Progressive.
a) I've been writing letters since breakfast time.
b) I'm writing letters since breakfast time.
c) What are you reading now?
What have you been reading now?
d) Listen! somebody have been knocking on the door
Listen! somebody's knocking on the door.

Answer 1

Explicação:

b)i'm writing letters since breakfast time.

c)what are you reading now?