I don't understand why "unser" changes to "unserem" and why "tägliches" changes to "täglichen".

Why do those two words get suffixes because of "in"?

2 Answers 2


Note German is using cases (Nominative, Accusative, Genitive, Dative) and unser tägliches Leben is nominative.

in unserem täglichen Leben is a dative caused by the preposition "in" and thus declined to unserem täglichen.

  • 1
    But this doesn't address the reason why. A counterexample with in+accusative would be great.
    – Janka
    Oct 4, 2018 at 15:06
  • 5
    @Janka going into long "why" (is there a "why" with grammar?) won't help a user who seems to struggle with the cocept of declension per se?
    – Stephie
    Oct 4, 2018 at 15:51
  • 1
    Because it helps distinguishing two different kind of in.Because it helps telling apart a third meaning if you missed the initial in.
    – Janka
    Oct 4, 2018 at 16:05
  • 7
    @Janka Sometimes it's easy to simply give too much of an answer to beginners. My impression was somewhat along Stephies line: Basic struggles. Thus a concise answer.
    – tofro
    Oct 4, 2018 at 16:31

Your question is a bit bizarre, denizzerde. :-)) "Why do those two words get suffixes because of "in"?" There is only one 'in' in one of your examples, so how could these two adjectives depend on one 'in'?! :-)) But okay ...

unser tägliches Leben can be Nominativ, thus the subject of a sentence, or Akkusativ, thus an object of a sentence. The grammatical form of the isolated strcuture does not show what it is or will be.

a) [N = wer oder was?] Unser tägliches Leben ist ein einziger Kampf.

b) [A = wen oder was?) Unser tägliches Brot gib uns heute. (Lord's Prayer) -> Wir versuchen, unser tägliches Leben so gut wie möglich zu meistern.

unser tägliches Leben sticks to all the rules you know.

das neue Haus / ein neues Haus / mein neues Haus, dein neues Haus, ... unser neues Haus

in unserem täglichen Leben answers the question 'wann' or maybe 'wo', thus it's an adverbial phrase. It sticks to all the rules you know.

c) [wann?] ... in einem halben Jahr ...

d) [wo?] ... in einem modernen Land ...


in unserem täglichen Leben

That's just it. ;-)



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