Réponse:
pour le premier exercice
mon,ma,mes: my
ton,ta,tes: your
son,ses,sa(fille): her
son,ses,sa(garçon): his
notre,nos:our
votre,vos:your
leurs,leur:their
pour le deuxième
I : my
you: your
he :his
she: her
we: our
you: your
they:their
pour le 3 ème
YOUR
MY
OUR
HER
THEIR
pour le 4 c'est juste
..................................................................................
pour le 5 ème
it's my car
it's your dog
it's their cousin
it's her sister
it's his jacket