Ein vs. Einen
What is the difference between "ein" and "einen"? As in lesson 2 "ein Apfel" and "einen Apfel."
i'm pretty sure it should be ein Pferd since it is the object and possessive of der Mann. Pferd has a neutral gender as well so ein doesn't really change unlike masculine words like der Hund und der Apfel which will always change depending on whether it is Nominativ, Akkusativ, Dativ or Genitiv i believe!
Also such grammatical cases exist in Russian, Ukrainian and other Slavic languages. We have even more than 4 cases (Ukrainian - 7, Russian - 6).
Nouns and adjectives change extensively its endings and suffixes depending on grammatical case, however there are no articles, which makes it a little bit easier)
Hello, the problem with learning German grammar such as the Normative,Accusative, Dative and Genitive is that when as a beginner and trying to speak German, you do not have time to check which is the correct case to use when speaking. Sure grammar is important but we should not focus too much on grammar at the expense of more important aspects of learning German
The form of the indefinite article (a,an) is determined by the case, the gender of the noun, and the number of the noun. If you look at the table at the bottom of http://www.german-database.supanet.com/page6.html you can see exactly which form to use. So for apple (masculine), if the apple is the subject of the sentence, you use the Nominative row and the masculine column and you get "ein Apfel ist rot". If apple is in the accusative (usually the direct object of the verb) then you use the Accusative row and the masculine column to arrive at "Ich esse einen Apfel".
More examples for the cases mentioned in this thread:
Ein Auto fährt schnell. (Das Auto; the car)
Ein Fahrrad fährt schnell. (Das Fahrrad; the bike)
Ein Bus fährt schnell. (Der Bus; the bus)
Ein Zug fährt schnell. (Der Zug; the train)
Eine Straßenbahn fährt schnell. (Die Straßenbahn; the tram)
Ich fahre ein Auto. (Das Auto)
Ich fahre ein Fahrrad. (Das Fahrrad)
Ich fahre einen Bus. (Der Bus)
Ich fahre einen Zug. (Der Zug)
Ich fahre eine Straßenbahn. (Die Straßenbahn)
in the duolingo examples, there is the sentence "we have a cat and a dog" which is translated to german as "wir haben eine katze und einen hund" (4th case both - eine + einen, not eine + ein 1st case) but the sentence with "der haustier" which is "we have a pet" is "wir haben ein haustier" - both haustier and hund are "der", sho WHY is there a difference in having a dog and having a pet expressed in einen Hund and ein haustier???
put it simple, that's the nominativ (Subject of the sentence) and Akkusativ (direct complement of the sentence), both in Masculin form. Example:
ein hund spaß macht mit einen man.
ein hund -> masculin subject (can be neutrum, duno), hence EIN einen man -> masculin direct complement, hence EINEN
Check out Nominativ und Akkusativ Artikels