Bonjour !
I/ Write affirmative sentences in the preterit
a) She/ dance / all night => She danced all night.
b) They/ watch/ TV => They watched TV.
c) I/ write/ letters => I wrote letters.
d) We/ sleep/ very well => We slept very well.
e) I /be/ happy => I was happy.
f) You / have/ a lot of friends => You had a lot of friends.
g) They / cook / delicious cakes => They cooked delicious cakes.
II/ Write the sentence in the negative in the preterit
a) I ate two muffins => I didn't eat two muffins.
b) They called their friend => They didn't call their friend.
c) We offered him a present => We didn't offer him a present.
d) You did your homework => You didn't do your homework.
e) They cooked a chocolate cake => They didn't cook a chocolate cake.
J'espère t'avoir aidé. Bon courage !