The Past Tense (imperfekti): the -i- Marker

The Finnish past tense — the imperfekti — is the tense you use to narrate what happened: I spoke, we went, she bought bread. It is built on one simple idea: take the present stem, insert the past marker -i-, then add the same personal endings you already know from the present. No auxiliary verb, no "did," no "was …-ing." One word carries the whole meaning, just as in the present.

The catch — and it is a real one — is that the -i- often reshapes the stem it lands on, so that antaa comes out as antoi and saada as sai. This page introduces the tense and the clean baseline; the stem reshaping is handled on the regular, stem-changes and Type-2 pages that follow.

The formula: stem + -i- + ending

Look at puhua ("to speak"), whose stem puhu- takes -i- with no drama. The past marker sits between the stem and the ending:

The third person singular is just stem + i with no ending at all: puhui. Every other form is stem + i + (n / t / mme / tte / vat).

The one-vowel trap: puhui vs puhuu

This is the pitfall that catches every learner, so meet it now. The past puhui ends in -ui (the -i- marker). The present third person puhuu ends in -uu (the doubled stem vowel). The entire tense contrast rides on that single letter — one i versus one extra u.

What the imperfekti means

The imperfekti is the plain narrative past: a completed event, usually tied to a definite past time (eilen yesterday, viime vuonna last year, silloin then). Importantly, it also covers what English splits off as the past progressive — Finnish has no separate "was …-ing," so puhui is both "spoke" and "was speaking," decided by context.

Imperfekti vs the perfect

Finnish, like English, also has a compound perfect — olen puhunut ("I have spoken") — built with olla plus a past participle, not with -i-. The division of labour matches English fairly closely:

• imperfekti — a finished event at a specific past time: Puhuin hänen kanssaan eilen. ("I spoke with her yesterday.")
• perfekti — an event with present relevance or an unspecified time: Olen puhunut hänen kanssaan. ("I have spoken with her" — at some point, and it still matters.)

If English would say "I went / I did," reach for the imperfekti; if English says "I have gone," reach for the perfect. Do not use the perfect where Finnish simply narrates the past.

The negative past does NOT use -i-

A warning worth planting early: the negative past does not add -i- to anything. Instead it uses the negative verb (en, et, ei…) plus the past participle (puhunut singular, puhuneet plural) — the very form the perfect uses.

So puhuin ("I spoke") negates to en puhunut ("I didn't speak"), never "en puhuin." Building the negative with the -i- form is one of the most persistent beginner errors.

Stems that change before -i-

Many verbs do not take -i- as tidily as puhua does. A quick preview of what is coming:

• antaa → antoi — the final a becomes o (stem-changes).
• ottaa → otti — the final a drops.
• tietää → tiesi — the t turns to s.
• saada → sai, syödä → söi — a long vowel or diphthong contracts (Type-2 page).

These are not random; each follows a rule, and the next pages take them one group at a time.

Common Mistakes

Key Takeaways

• The imperfekti is stem + -i- + personal ending: puhuin, puhuit, puhui, puhuimme, puhuitte, puhuivat.
• The 3sg is bare stem + i (puhui) — contrast it sharply with the present puhuu.
• It is the plain past, covering both "spoke" and "was speaking"; use it for dated, finished events.
• The negative past uses the participle (en puhunut), never the -i- form.
• Many stems reshape before -i- — see regular formation and stem changes.