Réponse :
1) If I visited in Guyana, I would go on a safari.
2) If I travel to Guyana, I may see my friend.
3) If I had not been sick,I would have taken a plane to discover Guyana.
Explications :
1) conditionnel 2 improbable
2) conditionnel 1 probabilité
3) conditionnel 3 ce qui attristé ou se passer dans le passé