Aspect in the Future

The aspect logic you learned for the past carries over to the future almost unchanged: perfective for "I'll get it done" (a single completed result) and imperfective for "I'll be doing it" (an ongoing or repeated activity). The Croatian future, like the past, has one main tense — Futur I, built from the clitic of htjeti plus the infinitive — and it accepts both aspects, so once again the fine-grained meaning rides on the aspect choice, not on a separate tense. There is one extra wrinkle the future adds, and it is the single most common future-tense error English speakers make: in kad / ako clauses Croatian does not use a future form at all, but the perfective present. This page handles both halves.

Futur I with both aspects

Futur I (ću, ćeš, će, ćemo, ćete, će + infinitive) is the everyday future. The aspect of the infinitive you slot in decides whether you are promising a process or a result.

Imperfective Futur I — ongoing or repeated future activity:

Perfective Futur I — a single completed future result:

Put the two members side by side and the contrast is exactly the past-tense one transplanted into the future:

The subordinate trap: kad / ako take the perfective present, not the future

This is the part that catches everyone. When a future action is set inside a time or condition clause introduced by kad ("when"), ako ("if"), čim ("as soon as"), or dok ("until"), Croatian does not repeat a future form. Instead it uses the present tense — and for a completed future event, that means the perfective present.

Recall from the aspect overview and the perfective meaning page that the perfective has no real present-time meaning. Its present form is, in effect, a future-completion form — and the kad / ako clause is exactly where it does its main work.

The English here uses a present in the when/if clause too — "when I finish", not "when I will finish" — so the structure should feel familiar. The trap is specifically the temptation to translate "I will" twice: *Kad ću pročitati knjigu, javit ću ti se is wrong. The future marker belongs only in the main clause; the subordinate clause takes the bare perfective present. (This is the same main-clause/subordinate-clause split discussed under Futur II.)

Imperfective present in subordinate clauses too

If the subordinate action is itself a process rather than a completed point, the same slot takes the imperfective present instead — still no future marker.

Notice these use budem / budeš — the future form of biti used in subordinate clauses (this is the Futur II territory). With most other verbs the plain present does the job; with biti and for emphasis on completion the bud- forms appear. At B1, the safe rule is: main clause = Futur I; kad/ako clause = perfective present (or imperfective present for an ongoing condition).

Common Mistakes

Key Takeaways

• Futur I takes both aspects: imperfective for "will be doing / will keep doing", perfective for "will get done / will finish".
• The duration-vs-deadline test from the past works unchanged in the future.
• In kad / ako / čim / dok clauses, use the perfective present (kad pročitam) for a completed future event — never Futur I (not *kad ću pročitati).
• Use the imperfective present (or the bud- forms of biti) in those clauses for an ongoing future condition.
• One future marker per statement, and it lives in the main clause.