Table of Contents
German Indefinite Articles: The German indefinite articles are ein (masculine and neuter) and eine (feminine) — the equivalents of “a” or “an” in English. Like definite articles, they change depending on the grammatical case: ein can become einen, einem, or eines. There is no plural indefinite article in German — you either drop the article or use kein/keine for negation. The good news: the endings follow the same patterns as der/die/das. The tricky part: masculine and neuter look identical in the nominative. Keep reading for the full breakdown.This article explains every form of the German indefinite articles across all four German cases — with example sentences for each one. If you’re looking for a quick visual reference with both definite and indefinite articles, check the German Articles Chart. For the definite article forms (der, die, das), see German Definite Articles. Not sure which type to use? Read the comparison: Definite vs. Indefinite Articles. This page focuses on understanding how and why ein and eine change.
German Indefinite Articles Table — All Cases at a Glance
| Masculine (ein Mann) | Feminine (eine Frau) | Neuter (ein Kind) | |
|---|---|---|---|
| Nominative | ein Mann | eine Frau | ein Kind |
| Genitive | eines Mannes | einer Frau | eines Kindes |
| Dative | einem Mann | einer Frau | einem Kind |
| Accusative | einen Mann | eine Frau | ein Kind |
How Each Case Changes the Indefinite Article
The table above shows what changes. Now let’s understand when and why. If you need a full overview of all four cases first, start with Cases in German — Easily Explained.Nominative: ein, eine, ein
The nominative case is the base form. It’s used when the noun is the subject of the sentence.Examples:
Ein Mann wartet an der Haltestelle. → A man waits at the bus stop.
Eine Frau liest ein Buch. → A woman reads a book.
Ein Kind spielt im Park. → A child plays in the park.
⚠️ Watch out: Masculine and neuter have the same form in the nominative: both use ein. You can only tell them apart from context or by knowing the noun’s gender. This is why learning nouns with their gender rules matters.
Genitive: eines, einer, eines
The genitive case expresses possession — like “‘s” or “of” in English. It’s also used after prepositions like wegen, trotz, während, statt.Examples:
Das Auto eines Mannes steht dort. → A man’s car is parked there.
Die Tasche einer Frau liegt auf dem Tisch. → A woman’s bag is on the table.
Das Spielzeug eines Kindes ist kaputt. → A child’s toy is broken.
Key point: Just like with definite articles (des), most masculine and neuter nouns add -(e)s to the noun itself in the genitive: eines Mannes, eines Kindes. The article ending (-es) AND the noun ending — both change.
Dative: einem, einer, einem
The dative case is used for the indirect object and after prepositions like mit, von, zu, bei, nach, aus, seit.Examples:
Sie hilft einem Mann. → She helps a man.
Er spricht von einer interessanten Idee. → He talks about an interesting idea.
Sie gibt einem Kind einen Ball. → She gives a child a ball.
Pattern to remember:
Masculine & neuter → einem
Feminine → einer
This mirrors the definite articles exactly: dem (masc/neut) and der (fem). The endings are the same — just with “ein-” in front.
Accusative: einen, eine, ein
The accusative case is used for the direct object and after prepositions like für, durch, gegen, ohne, um.Examples:
Wir sehen einen Mann auf der Straße. → We see a man on the street.
Hast du eine Katze? → Do you have a cat?
Ich kaufe ein Buch. → I buy a book.
⚠️ Important: Only masculine changes in the accusative: ein → einen. Feminine stays eine. Neuter stays ein. Exactly the same rule as with definite articles (der → den).
What About Plural? — Kein and Keine
German indefinite articles have no plural form. When you want to say “some” or refer to unspecified plural nouns, you simply drop the article:Examples without article:
Ich sehe Kinder im Park. → I see children in the park.
Er kauft Bücher. → He buys books.
Wir brauchen Äpfel. → We need apples.
For negation, German uses kein/keine — and these follow the exact same pattern as ein/eine, but with a plural form added:
| Masculine | Feminine | Neuter | Plural | |
|---|---|---|---|---|
| Nominative | kein | keine | kein | keine |
| Genitive | keines | keiner | keines | keiner |
| Dative | keinem | keiner | keinem | keinen |
| Accusative | keinen | keine | kein | keine |
Key insight: If you know ein/eine, you automatically know kein/keine — and also mein, dein, sein, ihr, unser, euer. They all use the same endings. Learn one pattern, use it everywhere.
For more on plural forms, see German Plural Nouns.
Patterns That Make Indefinite Articles Easier
You don’t need to memorize every form individually. These patterns simplify the table:Pattern 1 — Masculine and neuter are identical in the nominative.
Both use ein. Only context (or knowing the gender) tells you which is which. This is the only case where they overlap completely.
Pattern 2 — Only masculine changes in the accusative.
ein → einen. Feminine stays eine, neuter stays ein. Same rule as der → den.
Pattern 3 — Dative endings mirror the definite articles.
einem (masc/neut) mirrors dem. einer (fem) mirrors der. Same endings, just with “ein-” added.
Pattern 4 — Genitive endings mirror the definite articles too.
eines (masc/neut) mirrors des. einer (fem) mirrors der. And don’t forget: most masculine and neuter nouns also add -(e)s to the noun itself (eines Mannes, eines Kindes).
Pattern 5 — Ein/eine endings = kein/keine = mein/dein/sein endings.
All possessive pronouns (mein, dein, sein, ihr, unser, euer) and kein follow the exact same declension pattern as ein. Master one, master them all.
These patterns also connect to adjective endings — when there’s no definite article, the adjective takes on “stronger” endings. Understanding indefinite articles is the foundation.
Notice the pattern? Every single form depends on knowing the gender first. ein or eine, einen or einem — you can’t choose correctly until you know whether the noun is der, die, or das. The Article Trainer drills the gender of 1,000+ nouns until it’s automatic, shows you the rule behind every mistake, and brings weak words back through spaced repetition. Get the gender right first →
Test Yourself: 5 Quick Questions
You’ve read the rules — now let’s see if they stick. No guessing!1. “I see a man.” → Ich sehe ___ Mann.
- A) ein
- B) einem
- C) einen
- D) einer
Check Answer
Correct Answer: C) einen
“Sehen” takes the accusative. Mann is masculine. Masculine accusative = einen. This is the #1 form learners forget — ein only stays ein in the nominative.
2. “She helps a woman.” → Sie hilft ___ Frau.
- A) eine
- B) einer
- C) einem
- D) einen
Check Answer
Correct Answer: B) einer
“Helfen” takes the dative case. Frau is feminine. Feminine dative = einer.
3. “The toy of a child is broken.” → Das Spielzeug ___ Kindes ist kaputt.
- A) ein
- B) einem
- C) einer
- D) eines
Check Answer
Correct Answer: D) eines
“Of a child” = possession = genitive case. Kind is neuter. Neuter genitive = eines. Plus the noun gets -(e)s: Kindes.
4. “I buy a book.” → Ich kaufe ___ Buch.
- A) einen
- B) einem
- C) ein
- D) eines
Check Answer
Correct Answer: C) ein
“Kaufen” takes the accusative. Buch is neuter (das Buch). Neuter accusative = ein — it stays the same as nominative. Only masculine changes in the accusative.
5. “I don’t have children.” → Ich habe ___ Kinder.
- A) ein
- B) kein
- C) keine
- D) keinen
Check Answer
Correct Answer: C) keine
“Haben” takes the accusative. Kinder is plural. Plural accusative of kein = keine. Remember: there’s no “ein” for plural — you use kein/keine for negation.
Got some wrong? That’s normal.
Every ein or eine depends on knowing the gender first. Is it der Wein or das Wein? die Butter or der Butter? Without the correct gender, you can’t choose the right article in any case. The Article Trainer drills 1,000+ essential nouns filtered to your level (A1–C1), shows you the rule behind every mistake, and uses spaced repetition so the genders actually stick.
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Practice German Articles — $65 →Common Mistakes with German Indefinite Articles
❌ Wrong: Ich sehe ein Mann.
✅ Correct: Ich sehe einen Mann.
💡 Why: “Sehen” takes the accusative case. Masculine accusative = einen, not ein. This is the most common indefinite article mistake — using the nominative form where the accusative is needed.
❌ Wrong: Ich habe eine Kind.
✅ Correct: Ich habe ein Kind.
💡 Why: Kind is neuter (das Kind), not feminine. Neuter nominative and accusative = ein, not eine. Always check the gender with article rules first.
❌ Wrong: Das Auto eines Mann ist rot.
✅ Correct: Das Auto eines Mannes ist rot.
💡 Why: In the genitive case, most masculine and neuter nouns need -(e)s on the noun itself. The article ending (eines) isn’t enough — the noun changes too.
❌ Wrong: Ich habe ein Kinder.
✅ Correct: Ich habe Kinder. / Ich habe keine Kinder.
💡 Why: There is no plural form of ein. For unspecified plural nouns, drop the article entirely. For negation, use kein/keine. More on plural: German Plural Nouns.
❌ Wrong: Ich helfe eine Frau.
✅ Correct: Ich helfe einer Frau.
💡 Why: “Helfen” takes the dative case. Feminine dative = einer, not eine. Learners often forget that eine only works in nominative and accusative.
Frequently Asked Questions
What are the German indefinite articles?
The German indefinite articles are ein (for masculine and neuter nouns) and eine (for feminine nouns). They are the equivalent of “a” or “an” in English. Unlike English, they change form depending on the grammatical case: ein can become einen, einem, or eines.What is the difference between “ein” and “einen”?
Ein is the masculine and neuter nominative form (subject), while einen is the masculine accusative form (direct object). Example: “Ein Mann liest” (a man reads) vs. “Ich sehe einen Mann” (I see a man). Only masculine changes — neuter stays ein in both cases.What is the difference between “ein” and “eine”?
Ein is used for masculine and neuter nouns, eine for feminine nouns. Example: ein Tisch (masculine), ein Buch (neuter), eine Lampe (feminine). You need to know the gender of the noun to pick the right form. The article rules help you predict the gender.Do German indefinite articles have a plural form?
No. German has no plural indefinite article. For unspecified plural nouns, you simply drop the article: “Ich sehe Kinder” (I see children). For negation, use keine: “Ich habe keine Kinder” (I have no children). Kein/keine follows the same declension pattern as ein/eine.What is the difference between definite and indefinite articles?
Definite articles (der, die, das) refer to a specific noun (“the book”), while indefinite articles (ein, eine) refer to an unspecified noun (“a book”). Both change with case and gender. For the full comparison, read Definite vs. Indefinite Articles.How do indefinite articles affect adjective endings?
When an indefinite article comes before an adjective, the adjective takes “mixed” declension endings — which are different from those used with definite articles. For example: ein großer Mann (nominative) vs. der große Mann. The indefinite article doesn’t fully signal the gender, so the adjective ending has to do more work. For the full rules, see Adjective Endings.Do “mein,” “dein,” and “sein” follow the same pattern?
Yes. All possessive pronouns (mein, dein, sein, ihr, unser, euer) and kein use the exact same endings as ein/eine. Once you master the indefinite article declension, you automatically know how to decline all possessive pronouns too.It all comes back to der, die, das.
Indefinite articles, cases, adjective endings — every one of them starts with knowing a noun’s gender. Nail that, and the rest falls into place. The Article Trainer turns gender into instinct: 1,000+ nouns filtered to your level, an instant rule explanation on every mistake, an end-of-round summary of your weak patterns, and spaced repetition that targets exactly the words you struggle with. One payment, lifetime access — no subscription.
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