Romanian's compound tenses are powered by just four auxiliary series, but the four overlap in ways that look like deliberate sabotage. The perfect runs on a avea (am, ai, a…); the future on voi, vei, va…; the conditional on aș, ai, ar…; and a whole family of "perfect" moods plus the passive on a fi. Two of these series share identical-looking forms — am is both "I have [done]" and "we would," ai is both "you have [done]" and "you would" — and nothing about the auxiliary itself tells you which is which. What disambiguates them is what follows: a participle points to one reading, an infinitive to another. This page lays the four series side by side and gives you the test that resolves every clash.
The four series at a glance
| Person | a avea (perfect) | future (voi) | conditional (aș) | a fi |
|---|---|---|---|---|
| eu | am | voi | aș | sunt / fi* |
| tu | ai | vei | ai | ești / fi* |
| el / ea | a | va | ar | este / fi* |
| noi | am | vom | am | suntem / fi* |
| voi | ați | veți | ați | sunteți / fi* |
| ei / ele | au | vor | ar | sunt / fi* |
The *a fi column shows the finite present (used for the passive: este făcut) and the invariable fi (the same for all persons) that builds the "perfect" of the future, conditional, subjunctive, and presumptive: voi *fi mers, aș fi mers, să fi mers, o fi mers. The invariable *fi is what makes those four moods siblings.
Three of the columns are finite auxiliaries that carry person; the a fi invariable fi carries none — it just sits between another auxiliary and the participle. Notice immediately the collisions in the am, ai, am, ați rows between a avea and the conditional: those cells are spelled and pronounced identically.
What each series builds
| Series |
| Tense / mood | Example |
|---|---|---|---|
| a avea (am, ai, a…) | participle | perfect compus | am mers (I went) |
| voi, vei, va… | short infinitive | future | voi merge (I will go) |
| voi… + fi | participle | future perfect | voi fi mers (I'll have gone) |
| aș, ai, ar… | short infinitive | conditional | aș merge (I would go) |
| aș… + fi | participle | conditional perfect | aș fi mers (I'd have gone) |
| a fi (finite) | agreeing participle | passive | este făcut (it is made) |
Am terminat de citit raportul.
I've finished reading the report. (a avea + participle)
Voi termina raportul mâine.
I'll finish the report tomorrow. (voi + infinitive)
Aș termina raportul, dacă aș avea timp.
I'd finish the report, if I had the time. (aș + infinitive)
Raportul a fost terminat la timp.
The report was finished on time. (a fi + agreeing participle: passive)
The homography trap: am and ai
This is the part that genuinely catches people out. Look at am and ai across the two clashing series:
| Form | Reading A (a avea) | Reading B (conditional) |
|---|---|---|
| am | I have [done] — perfect 1sg | we would — conditional 1pl |
| ai | you have [done] — perfect 2sg | you would — conditional 2sg |
| ați | you (pl.) have [done] — perfect 2pl | you (pl.) would — conditional 2pl |
The auxiliary alone is ambiguous. Am… could be "I have…" or "we would…" — you cannot tell yet. The next word decides it: a participle means it's the perfect; a short infinitive means it's the conditional.
Am mers la mare vara trecută.
I went to the seaside last summer. (am + participle 'mers' = perfect, 1sg)
Am merge la mare, dar e prea departe.
We'd go to the seaside, but it's too far. (am + infinitive 'merge' = conditional, 1pl)
Ai văzut filmul ăsta?
Have you seen this film? (ai + participle 'văzut' = perfect, 2sg)
Ai vedea mai bine cu ochelari.
You'd see better with glasses. (ai + infinitive 'vedea' = conditional, 2sg)
There is also a subtler clue: person. As a perfect auxiliary, am is first-person singular ("I"); as a conditional auxiliary, am is first-person plural ("we"). So am mers is "I went" but am merge is "we would go." The shift in person tracks the shift in series. But the safest, fastest check remains the form that follows — participle vs infinitive.
The future vs popular-future overlap
A second, milder overlap: the popular future auxiliary o (3sg, in o veni) and the o of the o să future and of the presumptive o fi. These are all reduced from va, and they're told apart by what comes next — a bare infinitive (popular future), să + conjunctive (o să future), or fi + non-finite (presumptive). That tangle gets its own treatment on the presumptive vs future vs conditional page; here the point is just that the future and conditional series also feed the "perfect" moods by adding fi.
Va veni și el la nuntă.
He'll come to the wedding too. (future: va + infinitive)
Va fi venit deja când ajungem noi.
He'll have already come by the time we get there. (future perfect: va + fi + participle)
Why a fi is the special one
The fourth series, a fi, behaves differently from the other three. As a finite auxiliary it builds the passive, and there the participle agrees in gender and number (scrisoarea este scris*ă*, *casele au fost vândute*). As the invariable fi, it builds the "perfect" of moods — and there the participle stays invariable (aș fi mers, never aș fi mersă). Same little verb, two jobs, two participle behaviours.
Scrisoarea a fost trimisă ieri.
The letter was sent yesterday. (passive — participle 'trimisă' agrees, feminine)
Maria ar fi trimis scrisoarea, dar a uitat.
Maria would have sent the letter, but she forgot. (conditional perfect — participle 'trimis' invariable)
Quick disambiguation routine
When you meet an ambiguous auxiliary, run this:
- Is the next word a participle? (ends in -t, -s, -ut, etc.) → it's the perfect (with am, ai, a, au) or a "perfect" mood / passive (if fi or finite a fi is in the mix).
- Is the next word a short infinitive? (merge, vedea, veni) → it's the future (voi…) or the conditional (aș…).
- Stuck on am / ai / ați? Use rule 1–2: participle → perfect; infinitive → conditional. If still unsure, the person flips too (am = "I" in the perfect, "we" in the conditional).
Common Mistakes
❌ Reading 'Am merge la munte' as 'I went to the mountains.'
Incorrect — 'merge' is an infinitive, so this is the conditional 'we'd go', not the perfect.
✅ Am merge la munte. / Am mers la munte.
We'd go to the mountains. / I went to the mountains.
❌ Ai mânca deja? (intending 'have you eaten already?')
Incorrect — 'mânca' is the infinitive, giving the conditional 'you'd eat'; the perfect needs the participle 'mâncat'.
✅ Ai mâncat deja?
Have you eaten already?
❌ Aș mers, dar e târziu. (mixing conditional auxiliary with a participle)
Incorrect — present conditional is 'aș' + infinitive ('aș merge'); 'aș' + participle would be the perfect conditional 'aș fi mers'.
✅ Aș merge, dar e târziu. / Aș fi mers, dar era târziu.
I'd go, but it's late. / I would have gone, but it was late.
❌ Cartea a fost citit de toți. (passive participle not agreeing)
Incorrect — in the passive the participle agrees; with feminine 'cartea' it must be 'citită'.
✅ Cartea a fost citită de toți.
The book was read by everyone.
❌ Aș fi mersă acolo. (agreeing the participle in a compound mood)
Incorrect — in compound moods the participle stays invariable masculine: 'aș fi mers', even for a female speaker.
✅ Aș fi mers acolo.
I would have gone there.
Key Takeaways
- Four auxiliary series drive the compound forms: a avea (am, ai, a…) → perfect; voi, vei, va… → future; aș, ai, ar… → conditional; a fi → passive and (as invariable fi) the "perfect" of four moods.
- am, ai, ați are shared between a avea and the conditional — true homographs. The resolver is what follows: participle → perfect, infinitive → conditional. Person flips too (am = "I" perfect vs "we" conditional).
- Adding fi to a future or conditional auxiliary yields the future perfect (voi fi mers) and conditional perfect (aș fi mers).
- a fi has two participle behaviours: agreeing in the passive (este scrisă), invariable in compound moods (aș fi scris).
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Start learning Romanian→Related Topics
- Compound Tenses: OverviewB1 — Which Romanian tenses and moods are compound (an auxiliary plus a non-finite form) and which are synthetic single words — including the surprise that, unlike the rest of Romance, the pluperfect is synthetic.
- Clitics in Compound Tenses: The Complete RulesB2 — Where object and reflexive clitics attach across every compound tense — to the left of the auxiliary (l-am văzut, mă voi duce, m-aș duce), with the feminine -o jumping after the participle, and sitting between să and the verb in o-să/să futures.
- The Auxiliary Verbs: a fi, a avea, a vreaA2 — How Romanian's three auxiliary verbs — a fi, a avea, and a vrea — build the compound tenses, and why their auxiliary forms differ from the full verbs.
- The Conditional-Optative: OverviewB1 — An introduction to condițional-optativul, Romanian's 'would' mood — built from the dedicated auxiliary aș, ai, ar, am, ați, ar plus the bare short infinitive — covering polite requests, hypotheticals, and wishes, with the homograph traps spelled out.
- The Perfect Compus: OverviewA1 — An introduction to the perfect compus (am + past participle), Romanian's everyday past tense for completed actions — the only past tense the spoken language uses in practice.