Aspect and Aktionsart: How Icelandic Marks 'How'

English speakers arrive in Icelandic looking for the machinery they know: the obligatory progressive (I am eating vs I eat), and — if they've met a Slavic language — a perfective/imperfective pair baked into every verb. Icelandic has neither. There is no grammatical aspect at all: a single form, ég les, covers "I read," "I am reading," and "I do read," and a single preterite ég las covers "I read (once)," "I was reading," and "I used to read." This sounds like a loss of expressive power. It isn't. Icelandic conveys all the same nuances — ongoing, about-to-start, continuing, completed, habitual — but it does so lexically and periphrastically, with a small kit of verb + að + infinitive constructions and a handful of adverbs. The skill is knowing which device marks which nuance, and not reaching for a grammatical aspect that doesn't exist.

This page is the map of that toolkit. Two of its tools have their own dedicated pages — the progressive vera að (here) and the resultative vera búinn að (here) — so we'll only place them in the system and link out. The focus here is on the under-used devices: fara að (inceptive), halda áfram að (continuative), and var vanur að ("used to").

The toolkit at a glance

Notice the shared architecture: nearly every device is finite verb (vera / fara / halda) + að + bare infinitive. Once you internalise that frame, the whole system feels like one mechanism with interchangeable lead verbs.

Ongoing: vera að (in progress)

The closest thing Icelandic has to the English progressive is vera að + infinitive: ég er að lesa "I am reading," hún var að elda "she was cooking." It marks an action in progress at the reference time, exactly when you'd use English "-ing." Crucially, though, it is not obligatory the way English's is — the bare present can also describe something happening now — and it resists habitual and stative readings (you don't say \ég er að vita*). This construction has its own full treatment on the progressive page; here just slot it in as the "ongoing" tool.

Completive: vera búinn að (result)

At the other end of the action sits vera búinn að + infinitive, marking that the action is finished, done, over — the completive/resultative nuance: ég er búinn að borða "I've already eaten / I'm done eating." This is the everyday spoken way to mark completion, far more common than the hafa-perfect for a concrete finished action. It agrees with the subject (búinn / búin / búið) and has its own dedicated page; we mention it here so the system is complete: vera að opens the action, vera búinn að closes it.

Inceptive: fara að + infinitive (the workhorse 'start to / be about to')

This is the device English speakers most chronically under-use, and it is the heart of this page. Fara að + infinitive — literally "to go to (do)" — marks the beginning of an action: either "start to" or "be about to / be getting to the point of." It is the standard, idiomatic way to say something kicked off or is on the verge.

Two things to absorb. First, fara að often outranks the more literal byrja að "begin to." Both exist, but byrja að names a deliberate, bounded beginning ("I began to study at nine"), while fara að captures a drift into a state or action — getting to the point of, finding oneself starting to — which is what spoken Icelandic reaches for constantly. Second, fara here is fully tensed: present fer að (is about to), preterite fór að (started to), and the perfect-style er farinn að (has come to / is now starting to), which agrees like an adjective (farinn / farin / farið) just like búinn.

Continuative: halda áfram að (keep on)

To mark that an action continues / keeps going, use halda áfram að + infinitive — literally "to hold forward to (do)" = "to carry on doing." This is the continuative nuance, and again it is periphrastic where English just adds "keep" or "go on": hún hélt áfram að tala "she kept talking / went on talking."

Note the natural pairing of devices: fara að opens, halda áfram að sustains, hætta að ("stop -ing") closes. Hann fór að hlaupa, hélt áfram að hlaupa í klukkutíma og hætti svo að hlaupa — he started running, kept running for an hour, then stopped running. Three Aktionsart phases, three periphrastic verbs, all on the same að + infinitive frame.

Habitual past: var vanur að ('used to')

English has a dedicated past-habitual: "I used to go." Icelandic's standard equivalent is vera vanur að + infinitive — literally "to be accustomed to (do)" — used in the preterite for the "used to" sense: ég var vanur að fara "I used to go." Vanur is an adjective and agrees with the subject (vanur / vön / vant; plural vanir / vanar / vön), so a woman says ég var vön að.

The plain preterite can also carry a habitual past reading on its own when the context (or an adverb like alltaf, oft) makes the repetition clear: þegar ég var ungur fór ég oft í sveit "when I was young I often went to the countryside." But when you want to foreground "this was my habit, now abandoned," var vanur að is the precise tool — and it's another one English speakers leave on the shelf, defaulting to a bare preterite that loses the "no longer" flavour.

Habitual (general): the bare tense plus a particle

For ordinary, ongoing habits — "I always go on Sundays," "she often works late" — Icelandic just uses the bare present (or preterite) and lets an adverb (alltaf "always," oft "often," yfirleitt "usually," aldrei "never") supply the frequency. There is no special habitual form and, importantly, no progressive: a habitual vera að would be wrong.

This is where English-to-Icelandic transfer goes wrong in the opposite direction from usual: English uses the simple present for habits (I go on Sundays), which matches Icelandic — but learners who have over-learned "use vera að for ongoing actions" then wrongly extend it to habits, producing \ég er alltaf að fara í sund á sunnudögum (which, if anything, suggests an irritating repeated action, not a neutral habit). For a plain habit, drop the *vera að.

Why there's no perfective/imperfective pair to look for

If you've studied Russian or Polish, you expect each verb to come in a pair — one form for completed actions, one for ongoing — chosen grammatically every time you speak. Icelandic has nothing like this. Completion versus ongoing-ness is not built into the verb's morphology; it's expressed, when you need it, by choosing a periphrastic construction (vera að for ongoing, vera búinn að for completed) or by lexical aspect — the inherent meaning of the verb (finna "find" is inherently telic; leita "search" is inherently atelic) — plus context. So don't go hunting for a perfective partner to borða; there isn't one. If you must mark completion, say ég er búinn að borða; if you must mark progress, say ég er að borða; otherwise the bare ég borða is aspectually neutral and lets context decide.

Common Mistakes

Vera að is for "right now," not for habits. A repeated habit takes the bare present (optionally with alltaf / oft).

Byrja að names a deliberate, bounded start; for drifting into an action or emotion, fara að is the idiomatic inceptive.

Don't calque "used to" onto nota ("use") or any single verb. The past-habitual periphrasis is var vanur/vön að + infinitive.

Vanur is an adjective: vanur (m.), vön (f.), vant (n.), plural vön. Match it to the subject.

Don't drop áfram: halda áfram að = "continue to," but bare halda að = "think/believe that" — a completely different verb sense.

Key Takeaways

• Icelandic has no grammatical aspect — no obligatory progressive, no perfective/imperfective pair. Aspectual nuance is periphrastic and lexical.
• The toolkit shares one frame, verb + að + infinitive: vera að (ongoing), fara að (inceptive), halda áfram að (continuative), vera búinn að (completive).
• fara að is the workhorse inceptive — "start to / be about to" — and usually beats byrja að for a natural drift into an action: hann fór að gráta.
• halda áfram að = "keep on / continue"; don't drop áfram (bare halda að = "think that").
• var vanur að is the standard past-habitual "used to" — and vanur agrees (vanur / vön / vön).
• For a plain habit, use the bare present + an adverb (alltaf, oft), never vera að.
• Stop looking for a perfective partner to a verb — mark completion with vera búinn að, progress with vera að, and otherwise let the neutral bare form stand.