This is a consolidated reference for the two verbs learners confuse more than any other pair in Norwegian: være ("to be") and bli ("to become / to get"). They look like two ways of saying the same thing, and English speakers reach for være every time — but they encode different ideas. være names a state; bli names a change into that state, a transition. Seeing both full paradigms together, side by side, is the fastest way to internalise that bli is not a second "be" but its own verb meaning "become / get / turn out." On top of that, bli pulls double duty as the passive auxiliary, which makes it indispensable.
The two paradigms, side by side
være is irregular; bli is a strong verb (i–e–i pattern in bli / ble / blitt). Both take ha as their perfect auxiliary.
| Tense / mood | være (to be) | bli (to become / get) |
|---|---|---|
| Infinitiv | å være | å bli |
| Presens | er | blir |
| Preteritum | var | ble |
| Perfektum | har vært | har blitt |
| Pluskvamperfektum | hadde vært | hadde blitt |
| Futurum | vil/skal være | vil/skal bli |
| Imperativ | vær! | bli! |
| Presens partisipp | værende | blivende |
State vs change — the core contrast
The whole distinction comes down to one question: are you naming a condition, or naming the moment of entering that condition?
- være = the condition itself. Jeg er trøtt — "I am tired" (right now, that's my state).
- bli = the transition into the condition. Jeg blir trøtt — "I'm getting tired" (the tiredness is coming on).
Jeg er trøtt nå, jeg orker ikke mer.
I'm tired now, I can't take any more.
Jeg blir trøtt av å sitte stille så lenge.
I get tired from sitting still for so long.
Han er lege.
He is a doctor. (current state)
Han blir lege til sommeren.
He's becoming a doctor this summer. (transition)
English hides this distinction inside the same word "be" plus context, or splits it across "be / become / get / turn." Norwegian forces you to choose up front. A useful test: if you could swap in English "get" or "become" or "turn," you want bli; if it's a plain "am / is / are" describing how things are, you want være.
Det blir kaldt om kvelden her oppe.
It gets cold in the evenings up here.
Det er kaldt ute i dag.
It's cold outside today.
bli as the passive auxiliary
Beyond "become," bli is one of the two ways Norwegian builds the passive voice. The bli-passive = bli + past participle, and it foregrounds the event of something being done.
Huset ble bygd i 1923.
The house was built in 1923.
Pakken blir levert i morgen.
The package will be delivered tomorrow.
Vinneren ble annonsert på scenen.
The winner was announced on stage.
Here English uses "was/were + participle"; Norwegian uses bli + participle. Don't substitute være — huset var bygd would describe the house's resulting state ("the house was [in a] built [condition]"), not the action of building it. That state-vs-event split is the same være/bli logic, now operating inside the passive. (The bli-passive stresses the action; the være-passive stresses the resulting state.)
bli meaning "stay / remain"
One more sense to file away: bli (often bli igjen / bli værende) can mean "stay, remain." This trips people up because "stay" feels like a state, yet Norwegian uses the change-verb. The logic: you resolve to remain, choosing to stay rather than leave — a kind of decision-event.
Bli her, jeg er straks tilbake.
Stay here, I'll be right back.
Vi ble hjemme hele helgen på grunn av regnet.
We stayed home all weekend because of the rain.
Common Mistakes
❌ Jeg er sint når jeg hører sånt.
Usually wrong if you mean the reaction — 'er' states an existing mood, not the onset
✅ Jeg blir sint når jeg hører sånt.
I get angry when I hear things like that.
❌ Huset var bygd i fjor av en lokal entreprenør.
Wrong for the action — describes a state, not the building event
✅ Huset ble bygd i fjor av en lokal entreprenør.
The house was built last year by a local contractor.
❌ Jeg har vart syk hele uka.
Misspelled supine — it's vært with æ, not vart
✅ Jeg har vært syk hele uka.
I've been sick all week.
❌ Vær her til jeg kommer tilbake.
Wrong verb for 'stay' — vær means 'be'; for 'stay/remain' use bli
✅ Bli her til jeg kommer tilbake.
Stay here until I get back.
Key Takeaways
- være / er / var / har vært = a state ("be"). bli / blir / ble / har blitt = a change of state ("become, get, turn").
- Test: if English would use "get / become / turn," use bli; if "am/is/are," use være.
- Spelling: supine vært (æ) and blitt (double t).
- bli + past participle = the action passive ("ble bygd" = was built). være
- participle would name a resulting state instead.
- bli also means "stay / remain" (bli her) — a transition-verb doing a "staying" job.
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- være (to be)A1 — The complete conjugation of Norwegian's most important verb — present er, preterite var, supine vært, imperative vær — a fully suppletive copula whose forms never change for person.
- bli (to become / get)A1 — The full conjugation of bli — present blir, preterite ble, supine blitt, imperative bli — the change-of-state counterpart to være and the auxiliary of the bli-passive.
- være vs bli: Be vs BecomeA2 — Use være for a state that already holds and bli for any change of state, future state, or passive — the single most useful copula distinction in Norwegian.