By the time you reach this page you have met the three declension patterns separately — weak, strong, and mixed — and seen them tied together in the unified system. Knowing the tables is not the same as being able to produce the right ending in real time, mid-sentence, while you are also thinking about word order and vocabulary. This page closes that gap. It is a workshop: a series of fully worked derivations where we narrate the reasoning out loud each time, so the procedure — not just the answers — becomes automatic.
The four-step procedure
Every adjective ending in German falls out of the same four questions, asked in the same order. Train yourself to run this loop and you will never have to guess.
| Step | Question | Why it matters |
|---|---|---|
| Is there a der-word, an ein-word, or no article? | This chooses weak, mixed, or strong. |
| Nominative, accusative, dative, or genitive? | Driven by the verb or preposition. |
| Masculine, feminine, neuter — or plural? | The noun's grammatical gender, not its meaning. |
| Look up (or recall) the cell and write the ending. | The mechanical step, only safe after 1–3. |
The single most important habit this page wants to build is not skipping step 2. English speakers reliably get the nominative right — der alte Mann, ein kaltes Bier — and then collapse every oblique case to a vague -en without re-checking. Most real-world ending errors live in the dative and genitive, precisely because the case was never consciously identified.
Warm-up: nominative across all three article types
Let us start where it is easy, to lock in the procedure, then push into the hard cases.
Derivation 1 — der + jung + Hund (the young dog). Step 1: der is a der-word, so weak. Step 2: it is the subject, so nominative. Step 3: Hund is masculine, singular. Step 4: weak nominative masculine takes -e. Result: der junge Hund.
Der junge Hund bellt die ganze Nacht.
The young dog barks all night.
Derivation 2 — ein + jung + Hund. Step 1: ein is an ein-word, so mixed. Step 2: nominative again. Step 3: masculine singular. Step 4: here is the wrinkle — ein itself shows no ending in the nominative masculine, so the adjective must carry the case marking and goes strong: -er. Result: ein junger Hund.
Ein junger Hund braucht viel Bewegung.
A young dog needs a lot of exercise.
Derivation 3 — no article + jung + Hunde (young dogs). Step 1: no article at all, so strong. Step 2: nominative. Step 3: plural. Step 4: strong nominative plural is -e. Result: junge Hunde.
Junge Hunde lernen schneller als alte.
Young dogs learn faster than old ones.
Notice already how the same adjective jung surfaces as junge, junger, junge — three endings, all nominative, decided purely by what precedes it. That is steps 1 and 3 doing their work.
The dative singular — where errors cluster
The dative is the case English speakers most often skip past. It is forced by prepositions like mit, aus, bei, nach, von, zu, seit, and by in/an/auf when there is no motion. Watch the procedure run on each gender.
Derivation 4 — mit + der + alt + Auto (with the old car). Step 1: dem is a der-word → weak. Step 2: mit always takes dative. Step 3: Auto is neuter, singular. Step 4: the entire weak dative is -en. Result: mit dem alten Auto.
Wir sind mit dem alten Auto bis nach Italien gefahren.
We drove all the way to Italy in the old car.
Derivation 5 — in + einer + klein + Stadt (in a small town). Step 1: einer is an ein-word → mixed. Step 2: in with no motion (location, not direction) → dative. Step 3: Stadt is feminine, singular. Step 4: in the mixed dative the ein-word einer already shows the dative clearly, so the adjective is weak: -en. Result: in einer kleinen Stadt.
Sie ist in einer kleinen Stadt im Schwarzwald aufgewachsen.
She grew up in a small town in the Black Forest.
Derivation 6 — aus + gut + Familie, no article (from a good family). Step 1: no article → strong. Step 2: aus takes dative. Step 3: feminine singular. Step 4: strong dative feminine is -er (the adjective must now reproduce the dative ending the missing article would have carried). Result: aus guter Familie.
Er kommt aus guter Familie, aber das merkt man ihm nicht an.
He comes from a good family, though you wouldn't know it to look at him.
The lesson of derivations 4–6: in the weak and mixed dative the adjective relaxes to -en, but in the strong dative (no article) it must shoulder the full marking — -em for masculine/neuter, -er for feminine, -en for plural. Whether the adjective is weak or strong was decided back at step 1, long before you reached the ending.
The genitive — short, marking-heavy, and predictable
The genitive shows possession and follows prepositions like trotz, wegen, während, statt, (an)statt. Two facts make it manageable: with a der- or ein-word the adjective is always -en, and the masculine/neuter noun usually adds -(e)s.
Derivation 7 — trotz + des + schlecht + Wetter (despite the bad weather). Step 1: des is a der-word → weak. Step 2: trotz takes genitive. Step 3: Wetter is neuter, singular. Step 4: weak genitive → -en; the noun adds -s: Wetters. Result: trotz des schlechten Wetters.
Trotz des schlechten Wetters sind wir wandern gegangen.
Despite the bad weather, we went hiking.
Derivation 8 — wegen + eines + groß + Problem (because of a big problem). Step 1: eines is an ein-word → mixed. Step 2: wegen takes genitive. Step 3: Problem is neuter, singular. Step 4: in the genitive the ein-word eines shows the case fully, so the adjective is weak: -en; noun adds -s: Problems. Result: wegen eines großen Problems.
Wegen eines großen Problems mit dem Server fiel die Seite stundenlang aus.
Because of a big server problem, the site was down for hours.
The takeaway: across both genitive examples the adjective ending is identical — -en. The genitive is, ironically, one of the easiest cases for adjectives, because whenever an article is present the answer is simply -en. The marking lives on the article and the noun's -s, not on the adjective.
Plural: der-word versus no article
The plural is where the strong/weak split is most visible, because the contrast between "article present" and "article absent" is so stark.
Derivation 9 — die + gut + Freunde (the good friends). Step 1: die (plural definite article) is a der-word → weak. Step 2: nominative. Step 3: plural. Step 4: the entire weak plural is -en. Result: die guten Freunde.
Die guten Freunde von früher sieht man viel zu selten.
You see your good friends from the old days far too rarely.
Derivation 10 — gut + Freunde, no article (good friends). Step 1: no article → strong. Step 2: nominative. Step 3: plural. Step 4: strong nominative plural is -e. Result: gute Freunde.
Gute Freunde merkt man erst, wenn man sie wirklich braucht.
You only notice who your good friends are when you really need them.
This pair is the cleanest illustration of the whole system: die guten Freunde (weak, -en) versus gute Freunde (strong, -e). The article's presence flips the ending. When die is there to carry the plural marking, the adjective weakens; when nothing precedes it, the adjective must signal "plural nominative" itself with strong -e.
Two more, with stem-changing adjectives
A reminder that a small group of adjectives alters its stem when an ending is attached — see stem changes for the full story. The ending logic is unchanged; only the spelling of the stem shifts.
Derivation 11 — ein + dunkel + Zimmer (a dark room). Steps 1–3: mixed, nominative/accusative, neuter singular → the strong neuter ending -es (because ein shows no ending here). Step 4 with a twist: dunkel drops its inner -e- before a vowel ending, giving the stem dunkl-. Result: ein dunkles Zimmer, not ein dunkeles Zimmer.
Ich hätte gern ein dunkles Zimmer — ich schlafe sonst schlecht.
I'd like a dark room — otherwise I sleep badly.
Derivation 12 — ein + teuer + Auto (an expensive car). Same slot, neuter, strong -es. teuer likewise drops the -e-: stem teur-. Result: ein teures Auto, not ein teueres Auto.
Für ein teures Auto habe ich einfach kein Geld.
I simply don't have the money for an expensive car.
Common Mistakes
❌ mit dem alte Auto
Incorrect — dative was not checked; the easy nominative -e leaked through.
✅ mit dem alten Auto
with the old car
This is the single most frequent adjective error English speakers make. Mit forces the dative, where every weak ending is -en. The fix is procedural: when you see a dative trigger, run step 2 consciously before writing anything.
❌ trotz des schlechte Wetter
Incorrect — genitive ending missing on both adjective and noun.
✅ trotz des schlechten Wetters
despite the bad weather
Two omissions at once: the adjective should be -en (weak genitive), and the neuter noun needs its genitive -s (Wetters). The genitive is marking-heavy; expect -en on the adjective and -s on a masculine or neuter noun.
❌ aus guten Familie
Incorrect — no article means strong, and strong dative feminine is -er, not -en.
✅ aus guter Familie
from a good family
With no article the adjective goes strong and must reproduce the case ending the missing article would have shown. Strong dative feminine is -er. Defaulting to -en (the weak habit) ignores step 1.
❌ die gute Freunde
Incorrect — weak plural is always -en; -e is the strong plural (no article).
✅ die guten Freunde
the good friends
A classic mid-phrase pattern mix: the writer correctly identified the plural but reached for the strong plural ending while a der-word (die) was present. With an article, the plural is weak -en.
❌ ein dunkeles Zimmer
Incorrect — dunkel drops its inner -e- before an ending.
✅ ein dunkles Zimmer
a dark room
The ending choice (-es) was right; the stem was not contracted. Adjectives in -el and -er lose the -e- before any ending: dunkel → dunkles, teuer → teures.
Key Takeaways
- Run the four steps in order every time: article type → case → gender/number → ending. The order is the point.
- Errors cluster in the dative and genitive because the case is skipped, not because the rule is hard. Name the case before you write.
- After a der-word, the dative, genitive, and plural are all -en; after no article, the adjective goes strong and must carry the full case ending (-em, -er, -en, -es).
- The genitive adjective with any article is reliably -en — the work is done by the article and the noun's -s.
- Stem-changing adjectives (dunkel → dunkl-, teuer → teur-, hoch → hoh-) keep the normal endings; only the stem spelling shifts.
Now practice German
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning German→Related Topics
- The Adjective-Ending System UnifiedB1 — One decision procedure that ties weak, strong, and mixed together: the case must be marked strongly exactly once in the noun phrase.
- Weak Adjective Declension (after der-words)A2 — The weak endings used when a definite article or der-word already shows the case: only -e or -en, with -e in just five cells.
- Strong Adjective Declension (no article)B1 — The strong endings used when no article precedes: the adjective itself carries the full case marking, mirroring the der-word endings.
- Mixed Adjective Declension (after ein-words)B1 — The hybrid pattern after ein-words: weak endings where the ein-word inflects, but strong endings in the three gaps where ein shows nothing.