German Adjectives

German adjectives are a topic that builds directly on your knowledge of the cases (Nominative, Accusative, Dative, Genitive). The key thing to remember is that the ending of the adjective changes depending on three factors:

1. The Case (Nominative, Accusative, Dative, Genitive)

2. The Gender (Masculine, Feminine, Neuter, Plural)

3. The Type of Article that comes before it (Definite, Indefinite, or No Article)

This might seem overwhelming, but it follows very clear patterns. Let's break it down.

The Core Concept: Why do adjective endings change?

Think of the adjective's job as being a "supporting actor" to the article. The article (like der, die, das, ein, eine) carries the main grammatical information (case & gender). The adjective ending provides a little extra reinforcement.

There are three main sets of declension patterns, often called the "Three Lanes":

1. The "Weak" Declension (After a Definite Article - der, die, das, die (pl.))

2. The "Mixed" Declension (After an Indefinite Article - ein, eine, kein, mein, dein, etc.)

3. The "Strong" Declension (With No Article)

1. Weak Adjective Declension (after Definite Articles)

This is the simplest one. After der, die, das, die (pl.), the adjective almost always takes the ending -e or -en.

The Rule of Thumb: If the article already clearly shows the case and gender (e.g., dem, des, den (pl.)), the adjective ending is -en. The only times it's -e are in the Nominative and Accusative, where the article is less "descriptive" (der, die, das).

2. Mixed Adjective Declension (after Indefinite Articles)

This is used after the "ein"-words: ein (a), kein (no), mein (my), dein (your), sein (his), ihr (her), unser (our), etc.

Here, the adjective takes over the job of showing the case/gender when the article itself is "weak" (like ein, which looks the same for Nominative Masculine and Nominative Neuter).

The Rule of Thumb: The adjective ending is the same as the definite article ending when the indefinite article doesn't provide that information.

• Look at Nominative Masculine: ein tells us nothing, so the adjective takes -er (like der).

• Look at Nominative Neuter: ein tells us nothing, so the adjective takes -es (like das).

• In the Dative Plural: keinen is very clear, so the adjective takes the standard -en.

3. Strong Adjective Declension (with No Article)

When there is no article before the adjective, the adjective must do all the work of showing the case and gender. It takes the endings that the definite article would have had.

The Rule of Thumb: The adjective endings are essentially the same as the endings for der, die, das, die (pl.) in the corresponding case. This is the "strongest" form of the adjective declension because the adjective carries the full load.

Summary & Mnemonics

To make it easier, focus on these patterns:

1. Is there a definite article? (der-words)

   • → Adjective ending is almost always -en, except for Nominative (and Accusative non-Masculine) which is -e.

2. Is there an indefinite article? (ein-words)

   • → Look at the article. If the article is "empty" (like ein or eine), the adjective gets the "strong" ending (-er, -e, -es). If the article is descriptive (like einen, einem, einer), the adjective gets -en.

3. Is there NO article?

   • → The adjective gets the "strong" endings (the same as the definite article endings: -er, -e, -es, -em, -en, -er).

Special Cases & Tips

• Dative Plural is always -en: No matter which "lane" you're in, the adjective ending in the dative plural is always -en. (e.g., mit den großen Hunden, mit meinen großen Hunden, mit großen Hunden).

• After "wie" (how): When asking "Wie?" the adjective is not declined.

  • Der Mann ist alt. (The man is old.) - Predicate adjective, no declension.

  • Das ist ein alter Mann. (That is an old man.) - Attributive adjective, must be declined.