The l-Participle (radni glagolski pridjev)

One verb form does more heavy lifting in Croatian than any other: the l-participle (radni glagolski pridjev, "active verbal adjective"). It is the cornerstone of the everyday past tense (the perfekt), the conditional (radio bih "I would work"), and the future-two (futur drugi). Master its formation once and three whole tense systems open up. There is, however, one feature that surprises every English speaker and never stops being relevant: the l-participle is an adjective, so it agrees with the subject in gender and number — which means your own gender shows up every single time you talk about your past.

Why it is called the l-participle

Historically this form ended in -l: the old masculine of raditi was radil. That final -l is still visible in the feminine, neuter, and all plurals (radi-la, radi-lo, radi-li), but in the modern masculine singular the -l turned into -o: radil → radio. That single sound change explains the whole otherwise-puzzling masculine ending, and it is the only genuinely irregular-looking part of the pattern.

Formation from the infinitive stem

For regular verbs, the recipe is mechanical. Take the infinitive, drop -ti to get the stem, then add the gender/number ending:

The same six endings apply to the vast majority of verbs. Čitati → čitao, čitala, čitalo, čitali, čitale, čitala; gledati → gledao, gledala…; kupiti → kupio, kupila….

Agreement is constant and personal

Because the participle agrees, the speaker's gender is encoded in every past-tense "I" sentence. This has no English parallel: "I read the book" hides the speaker's sex, but Croatian forces a choice.

Agreement also follows number and the gender of any subject, not just "I":

A mixed-gender group takes the masculine plural -li, the default for "they" of any composition: Ana i Marko su došli.

The "fleeting a": consonant stems

When the verb stem ends in a consonant, inserting a vowel keeps the word pronounceable. Two very common verbs show this:

• rekao ("said," masc.) from the stem rek-: a "fleeting a" appears before the -o, giving rek-a-o = rekao. But the feminine drops it again: rek-la = rekla.
• mogao ("could," masc.) from mog-: same pattern, mog-a-o = mogao, feminine mog-la = mogla.

Verbs in -ći and the suppletive ići

Verbs whose infinitive ends in -ći never have a clean -ti stem to strip, so their participles must be learned. The most important are doći and the wildly irregular ići.

Ići is suppletive: its participle išao / išla shares no obvious material with the infinitive ići or the present idem — you simply memorise it, exactly as English memorises "go / went / gone". Note also that došao shows the fleeting a (doš-a-o) just like rekao, and the š surfaces from the stem.

A handful of -jeti / -ti oddities

A few frequent verbs adjust a vowel in the participle. The standout is vidjeti → vidio (masc.), where the -je- of the infinitive surfaces as -i- before the -o; the feminine keeps the longer shape, vidjela.

What the l-participle builds

The l-participle is not a tense by itself — it is the building block of three:

• Perfect (past): clitic biti
  • participle → radio sam "I worked". See the perfect tense.
• Conditional: bih/bi…
  • participle → radio bih "I would work". See the conditional.
• Future-two: budem…
  • participle → budem radio. See the future-two.

In every one of these, the participle keeps agreeing with the subject, so the gender/number choices on this page apply throughout.

Common Mistakes

Key Takeaways

• The l-participle (radni glagolski pridjev) builds the perfect, conditional, and future-two.
• Regular formation: drop -ti, add -o (masc., from old -l), -la (fem.), -lo (neut.), plural -li / -le / -la.
• It is an adjective: it agrees with the subject in gender and number, so your own gender appears in every past "I" sentence — radio sam (man) vs radila sam (woman).
• Learn the irregulars: reći → rekao/rekla, moći → mogao/mogla, doći → došao/došla, the suppletive ići → išao/išla, and vidjeti → vidio/vidjela.
• A mixed-gender plural takes masculine -li.