Etant donnéUse the past participle of the verb “to give”. qu’ils sont obligés de garder le lit“They have to stay in bed” makes sense. However, considering the context, you’d do well to find a more idiomatic expression., les malades grabatairesThe adjective you need here begins with “bed-“. Use a dictionary if necessary. ont fréquemment des escarres.The noun you need here also begins with “bed-“.