English marks no gender on nouns and no agreement on adjectives at all — a big house, big houses, the houses are big all use the bare form big. Norwegian, by contrast, makes the adjective and the article echo the noun's gender, number, and definiteness. Because your native language gives you nothing to copy, the default English-speaker error is simple: under-marking everywhere. You leave endings off because in English there are none to add. This page sorts the errors by type, and the good news is that two small fixes — add *-t for neuter*, *add -e for plural/definite (including predicates)* — clear up the large majority of them.
A two-minute map of the system
Every Norwegian noun has a gender: masculine (en), feminine (ei/en), or neuter (et). Gender is mostly arbitrary and must be learned with the noun — there is no reliable rule, just as there is none in German or French. The gender then controls the indefinite article and the endings on any adjective and the definite suffix. (For the full gender system see nouns/gender-overview; for the adjective paradigm see adjectives/agreement.) The four error types below are where English speakers actually slip.
Error type 1: wrong gender on the article (et bil)
Because gender is unpredictable, the commonest mistake is simply picking the wrong article — usually defaulting to the wrong one and saying et where it should be en, or vice versa.
❌ et bil
Incorrect — 'bil' (car) is masculine, so it takes en, not et.
✅ en bil
a car
❌ en hus
Incorrect — 'hus' (house) is neuter, so it takes et.
✅ et hus
a house
✅ Vi kjøpte et hus og en bil samme år.
We bought a house and a car the same year.
There is no shortcut: gender is a property you memorise with the noun. Learn bil as en bil, hus as et hus, jente as ei/en jente — store the article in the same memory slot as the word. Getting the gender wrong is not just a small slip, because everything downstream (the adjective ending, the definite suffix) is calculated from it.
Error type 2: missing neuter -t on the adjective (et stor hus)
This is the single highest-yield fix on the page. When an adjective stands before an indefinite neuter noun, it takes a -t ending. English has nothing here, so English speakers leave the adjective bare.
❌ et stor hus
Incorrect — neuter noun needs -t on the adjective: stort.
✅ et stort hus
a big house
❌ et gammel hus
Incorrect — neuter requires the -t ending: gammelt (note -el- drops its e: gammel → gammelt).
✅ et gammelt hus
an old house
The pattern: masculine/feminine indefinite singular = bare adjective (en stor bil — a big car), but neuter indefinite singular = adjective + -t (et stort hus — a big house). So the same adjective changes shape purely because the noun is neuter.
✅ Det var en stor bil og et stort hus.
It was a big car and a big house. (stor → stort only because hus is neuter)
Error type 3: missing -e in the plural and the predicate (barna er glad)
When the noun is plural, the adjective takes -e — in every position, including after the verb er (is/are). English uses the bare form in the same place (the children are happy), so this is the error English speakers most reliably forget, especially in the predicate, where there is no visible noun right next to the adjective.
❌ to stor biler
Incorrect — plural noun needs -e on the adjective: store.
✅ to store biler
two big cars
❌ Barna er glad.
Incorrect — the subject is plural, so the predicate adjective takes -e: glade.
✅ Barna er glade.
The children are happy.
❌ De er trøtt etter turen.
Incorrect — plural subject 'de' demands a plural predicate: trøtte.
✅ De er trøtte etter turen.
They're tired after the trip.
The trap is the predicate. Barna er glad feels right to an English speaker because in English the adjective never changes after be. But Norwegian agreement reaches across the verb: a plural subject pulls -e onto the adjective even when the adjective stands alone after er. Think of it as "the adjective remembers what it is describing, no matter how far away."
✅ Husene er gamle, men fine.
The houses are old but nice. (both predicate adjectives take plural -e)
Error type 4: definite forms — the double definite and the wrong -t (det stort hus)
Norwegian's definite ("the") construction is famous for marking definiteness twice, which English never does. The full pattern for the big house is:
det store huset — det (the, neuter) + store (adjective with -e) + huset (noun with the definite suffix -et).
Three things are marked at once: a front article (det), the -e on the adjective, and the suffix on the noun. English speakers, having no model for any of this, make two opposite errors. First, they drop one of the markers (usually the noun suffix or the front article). Second — confusingly — they keep the neuter -t on the adjective, importing it from the indefinite, when the definite form actually uses -e.
❌ det stort hus
Incorrect twice — definite needs -e on the adjective (store) and the suffix on the noun (huset).
✅ det store huset
the big house
❌ den store bil
Incorrect — the noun is missing its definite suffix: bilen.
✅ den store bilen
the big car
So the adjective ending flips depending on definiteness: indefinite neuter takes -t (et stor*t hus), but the *definite form takes -e (det stor*e huset) regardless of gender. And the noun itself must carry its suffix — *huset, bilen — even though the front article det/den is already there. This double definiteness ("the … the-house") is one of the hardest single features for English speakers, because it feels redundant. (For why it works this way, see adjectives/agreement.)
✅ Den gamle damen og det lille barnet ventet på bussen.
The old lady and the little child waited for the bus. (full double-definite: article + -e adjective + suffixed noun on both)
Common Mistakes
❌ et bil
Incorrect — 'bil' is masculine: en bil.
✅ en bil
a car
Gender is lexical and must be memorised with the noun; bil is en, hus is et.
❌ et stor hus
Incorrect — indefinite neuter needs -t on the adjective.
✅ et stort hus
a big house
Whenever you write et, expect -t on the adjective between article and noun.
❌ Barna er glad.
Incorrect — plural subject takes a plural predicate adjective.
✅ Barna er glade.
The children are happy.
Agreement reaches across er: a plural subject pulls -e onto the predicate adjective.
❌ den store bil
Incorrect — the definite noun needs its suffix: bilen.
✅ den store bilen
the big car
Double definiteness: front article + -e adjective + suffixed noun, all three together.
❌ det stort huset
Incorrect — the definite form uses -e on the adjective, not the indefinite -t.
✅ det store huset
the big house
The neuter -t belongs to the indefinite (et stort hus); the definite switches the adjective to -e (det store huset).
Key Takeaways
- English marks no gender and no adjective agreement, so the default error is under-marking — add endings English wouldn't.
- Learn every noun with its article (en bil, et hus); gender is unpredictable and controls everything downstream.
- Two highest-yield reflexes: add -t for indefinite neuter (et stort hus) and add -e for plural and definite, including predicates (barna er glade).
- The definite "the" is marked three times — front article + -e adjective + suffixed noun (det store huset) — and the adjective uses -e, never the indefinite -t.
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Start learning Norwegian→Related Topics
- Adjective Agreement: -, -t, -eA1 — A Norwegian adjective changes shape to match its noun — bare with masculine/feminine singular (en stor bil), -t with neuter singular (et stort hus), -e with every plural (store biler) — and it agrees after 'to be' too, which English never does.
- Grammatical Gender: Masculine, Feminine, NeuterA1 — Norwegian's three grammatical genders (masculine en, feminine ei, neuter et), why gender is mostly unpredictable and must be learned per noun, and the real choice Bokmål gives you to collapse to a two-gender system.
- Agreement Pitfalls: Predicate Concord and AttractionC1 — The subtle agreement traps of advanced Norwegian — predicative adjectives that must agree in number and gender across the copula (de er trøtte, not trøtt), collective and coordinate subjects, the det-presentative's frozen neuter, the 'en av de som' verb-number problem, and attraction errors where the verb is pulled toward the nearer noun.