Finished the German tree.
It's been a long 57 days, but I've finally done it. I'll have to cut this short, but it is an amazing achievement for me. I will continue to use Duolingo with my German, French and Turkish, and also use Memrise as additional practice on all those languages. Thank you Duolingo. :)
Fast! Du würdest sagen:
"Aber du musst sofort auf Deutsch schreiben".
The modal verb "müssen" needs to be conjugated for "du", and we always use the preposition "auf" when talking about a language in this way. Then, you need to kick the infinitive "schreiben" to end the of the sentence.
Good question! I believe that's because "Guten Tag" is part of a fixed expression and the phrase "guten Tag!" is a fragment of that larger expression.
The full expression would be: Ich wünsche dir einen guten Tag!
The verb wünschen (to wish) needs a direct object (guten Tag) to wish UPON the indirect object here (dir).
So we just snip the very end off, but still must leave the adjective in the accusative case with an -en ending because Tag is masculine (der Tag).
Gute Arbeit doesn't take an "-en" at the end of "gut" because it is a feminine noun (die Arbeit). I suppose too we must consider the full expression. We could say something like "Das war gute Arbeit". This is of course the nominative case, but with feminine nouns, even if it WERE in the accusative case we would still say "gute Arbeit". Only with the Dative case could we see an adjective end with "-en" with a feminine noun. For example, something like, "mit der guten Arbeit". We know that "mit" is a Dative preposition always :-)
I actually found an example online: "Dank der guten Arbeit" (Thanks to the good work).
Hope that makes sense and is helpful :-)