Bonjour,
Réponse :
.
PRÉSENT PRÉTÉRIT
I am was
You are were
He/she/it is was
we are were
you are were
they are were
Il suffit donc de remplacer ....
a) Sylvie is in America and her parents are in France.
Sylvie was in America and her parents were in France
b) Where is the dog?
Where was the dog?
c) We are not tired.
We were not tired
d) Are you in the garden?
Were you in the garden?
e) My friend and I are playing tennis.
My friend and I were playing tennis