"Do I like the duck?"
Translation:Mag ich die Ente?
Is it necessary to reverse the verb and the subject to make a question? I thought that "Ich mag die Ente?" would be ok too
Usually, you do need to reverse the verb and the subject. A rising intonation, on the other hand, tends to signal surprise or doubt.
No. Ich möchte = I want, Ich mag = I like. Sometimes you want the things you like, sometimes not
Why is "Die Ente mag ich?" not correct. If it was do I like the apple Den Apfel mag ich would be correct...?
"Die Ente mag ich" is equal to "Ich mag die Ente" - in both cases the verb is the second word in the sentence. If you use it as a question, it is like you say "I like the duck?" instead of "Do I like the duck?" in English. Verb should take first place in a sentence that's a question in German: "Mag ich die Ente?". Hope my English is good enough to understand me.
I was never given any frame of reference to know how to structure this question.
In german the personal pronoun for the first person in singular is only capitalized at the beginning of the sentences ;)
In fact, the only presonal pronoun that is always capitalized is the formal you ("Sie").
I am pretty sure it is that way, but if I'm wrong, somebody correct me.
"Gefallen" and "mögen" are used quite differently. "Mögen" means "to like" and is used the same way, with an accusative object: "Ich mag die Ente" = "I like the duck." "Gefallen" essentially shows being liked (roughly "to please"), and, as you have in your sentence, the subject is liked by the dative object: "Die Ente gefällt mir" = "I like the duck." So "Mag mir die Ente?" is simply ungrammatical; it should be "Mag ich die Ente?" with the subject "ich."
Unfortunately, you really just have to memorize noun genders case by case. You can find lists of general guidelines (like this one), but they have plenty of exceptions and don't at all cover all nouns. For instance, ending with an "-e" is a decent indicator that the noun is feminine ("die Ente"), but some aren't ("der Junge").
So a good practice is to memorize a noun's gender along with the noun. Memorize "die Ente" instead of just "Ente." For Duolingo, you can usually tap the "the" or the adjective or whatever needs to be conjugated, and it should show you the correct ending.
If I want to say, "I like/love German (when referring to the language)", would "Ich mag/lieb (spelling error) Deutsch" work?
"Ich mag Deutsch" and "Ich liebe Deutsch" (with "-e" on "liebe") are both fine.