Réponse :
1/My grandmother has stopped running since she became ill last year.
2/we have had a cottage in Dordogne for 3 years
3/Loyds Bank has been here since five years
4/It was quite a shock as I haven't seen her forquite a long time
5/She has been rehearsing since the course started
6/She has been waiting for you to contact her since last week
7/I haven't made any mistakes about since and fo since I read the lesson
8/Robby hasn't spoken to some of his friends for 45 years
9/I have loved English since I joined the club
10/We have lived in New York since my eleventh birthday
Explications : For pour la durée (for two hours : pendat deux heures), since pour le point de départ (since Monday : depuis lundi qui est ici le oint de départ.) Mais tout était clairement expliqué dans ton cours