Hopefully a simple question.
In the sentence below the word "den" has been substituded for the word Der because it is in Accusative Case. - Das Mädchen arbeitet für den Vorsitzenden. But in the sentence below this statement you can see that "dem" has been substituded for the word Der because of I think the Dative rules. - Der Professor isst mit dem Vorsitzenden. Am I correct or not? And if so, isn't in both sentences "Vorseitzenden" the direct object? How I got the direct object: Sentence one: the girl works for what or whom? The chairman Sentence two: the professor eats with what or whom? The chairman