"The cat likes the girlfriend."
Translation:Die Katze mag die Freundin.
Dative is the indirect object, while accusative is the direct object - the object something is being done to. In this sentence, the girlfriend is being liked by the cat. So, the subject cat is nominative (der, die, das), while the girlfriend is accusative (den, die, das). An example of dative would be: He gives a pen to a cat/ He gives a cat a pen (Die Frau gibt einER Katze einEN Stift). In this case, the cat is the indirect object, while the pen is the direct object, being GIVEN.
Exactly my question. We were told earlier that Freundin = girlfriend if there is a reference whose girlfriend she is (meine Freundin, deine Freundin). Otherwise she is just a friend. I cannot imagine a situation in which the current sentence "The cat likes the girlfriend." makes sense. Any ideas?
Gern is an adjective placed at the end of sentences, used to give the meaning of 'like' to a verb. For example, Ich esse gern (I like to eat). Gern is not a verb, and I don't think it can be used here in any way to give the exact same meaning: it's like putting 'like to' as an adjective.