Every Romanian verb form is built one of two ways. Either it is a single inflected word — merg (I go), mergeam (I was going), mersesem (I had gone) — or it is an auxiliary plus a non-finite form — am mers (I went), voi merge (I will go), aș merge (I would go). The first kind are called synthetic tenses; the second, compound (in Romanian timpuri compuse). Knowing which is which is not a dry classification exercise: it tells you where the personal endings live, where clitic pronouns attach, and how negation works. And Romanian draws the line in a genuinely surprising place — its pluperfect, the "had done" tense, is synthetic (one word, mersesem), even though every other Romance language builds it from an auxiliary. This page maps the whole system so the later pages on auxiliaries and clitics have a frame to hang on.
Synthetic vs compound: the basic split
A synthetic form carries person, number, tense, and mood all inside one word, marked by endings on the verb stem. A compound form distributes that work across two (or three) words: a small auxiliary carries person and number, while the lexical meaning sits in a non-finite form — an infinitive, a participle, or (via să) a conjunctive.
| Synthetic (one word) | Compound (auxiliary + non-finite) |
|---|---|
| merg — I go | am mers — I went |
| mergeam — I was going | voi merge — I will go |
| mersei — I went (perfect simplu) | aș merge — I would go |
| mersesem — I had gone | o să merg — I will go (colloquial) |
Merg la birou în fiecare zi.
I go to the office every day. (synthetic present)
Am mers la birou și ieri.
I went to the office yesterday too. (compound — am + participle)
The compound tenses and moods
Here is the full inventory of Romanian's compound forms — the ones built from an auxiliary plus a non-finite verb. There are more of them than learners expect, and they run on just a handful of auxiliaries.
| Form | Auxiliary |
| Example |
|---|---|---|---|
| Perfect compus | a avea: am, ai, a… | participle | am mers (I went) |
| Future (literary) | voi, vei, va… | infinitive | voi merge (I will go) |
| Future (o să) | o
| conjunctive | o să merg (I will go) |
| Future perfect | voi…
| participle | voi fi mers (I will have gone) |
| Conditional present | aș, ai, ar… | infinitive | aș merge (I would go) |
| Conditional perfect | aș…
| participle | aș fi mers (I would have gone) |
| Presumptive | o, or…
| gerund / participle | o fi mers (he must have gone) |
| Perfect subjunctive | să
| participle | să fi mers (to have gone) |
| Passive (any tense) | a fi (in any tense) | participle | este făcut (it is made) |
Two patterns jump out. First, the "perfect" of every mood — future perfect, conditional perfect, perfect subjunctive, presumptive perfect — is built the same way: take the mood's auxiliary, add the invariable fi, then a participle. Voi fi mers, aș fi mers, să fi mers, o fi mers are siblings. Second, the passive is its own thing: a fi ("to be") in whatever tense you need, plus a participle that does agree (scrisoarea este scrisă — "the letter is written"). The compound active forms keep their participle invariable; the passive doesn't.
Voi merge la munte weekendul ăsta.
I'll go to the mountains this weekend. (future — voi + infinitive)
Aș fi mers, dar a plouat toată ziua.
I would have gone, but it rained all day. (conditional perfect — aș + fi + participle)
The synthetic tenses — including the surprise
The forms that are single words, with no auxiliary, are the present, the imperfect, the perfect simplu, and — here is the twist — the pluperfect.
| Form | Example (a merge) | Meaning |
|---|---|---|
| Present | merg | I go |
| Imperfect | mergeam | I was going / used to go |
| Perfect simplu | mersei | I went (literary/regional) |
| Pluperfect | mersesem | I had gone |
Everyone expects the present and the imperfect to be one word. The pluperfect is the shock. In English you say "I had gone" (two words); Spanish says había ido, French j'étais allé, Italian ero andato — every one of them an auxiliary plus a participle. Romanian alone keeps the pluperfect as a single synthetic word, mersesem, inherited directly from the Latin pluperfect. There is no auxiliary anywhere in it.
Mersesem deja la culcare când a sunat telefonul.
I had already gone to bed when the phone rang. (one word — no auxiliary)
Citisem cartea înainte să văd filmul.
I had read the book before I saw the film.
Why the split matters
This isn't bookkeeping. The synthetic/compound divide governs three things you use in every sentence:
Where the endings live. In a synthetic form, the person ending is on the lexical verb (mergeam). In a compound form, person is carried by the auxiliary (am mers, voi merge), and the lexical verb is frozen in its non-finite shape. So in am mers, "I-ness" lives in am, not in mers.
Where clitics attach. Object pronouns (mă, te, l, o, le…) cling to the auxiliary in compound tenses (l-am văzut, "I saw him"), but to the finite verb in synthetic ones (îl văd, "I see him"). The whole logic of clitic placement keys off this distinction — covered in clitics in compound tenses.
How negation works. Nu sits before the first element: before the auxiliary in a compound form (nu am mers, often n-am mers), before the verb in a synthetic one (nu mergeam).
L-am văzut ieri la piață.
I saw him yesterday at the market. (clitic on the auxiliary: l-am)
Îl văd în fiecare zi.
I see him every day. (clitic on the finite verb: îl)
N-am mers nicăieri aseară.
I didn't go anywhere last night. (nu before the auxiliary)
The auxiliaries at a glance
Romanian builds all its compound forms from a small set of auxiliaries. There are essentially four (detailed in the four auxiliary series compared):
- a avea (am, ai, a, am, ați, au) → the perfect compus.
- the future series (voi, vei, va, vom, veți, vor; colloquially o să) → the future.
- the conditional series (aș, ai, ar, am, ați, ar) → the conditional.
- a fi ("to be") → the passive, and as invariable fi the "perfect" of the future, conditional, subjunctive, and presumptive.
These overlap in ways that trip people up — am is both the perfect auxiliary and conditional 1pl, ai is shared too — which is exactly why the next page lays them out side by side.
Common Mistakes
❌ Aveam mers acasă când a sunat. (building a pluperfect with an auxiliary)
Incorrect — Romanian's pluperfect is synthetic, one word: 'mersesem', no auxiliary.
✅ Mersesem acasă când a sunat.
I had gone home when he called.
❌ Am avut mâncat înainte să veniți. (English/Spanish-style 'had eaten')
Incorrect — this periphrastic 'had' doesn't exist in Romanian; use the synthetic pluperfect 'mâncasem'.
✅ Mâncasem înainte să veniți.
I had eaten before you came.
❌ Eu mers la birou. (dropping the auxiliary from the perfect compus)
Incorrect — the perfect compus is compound; it needs the auxiliary: 'am mers'.
✅ Am mers la birou.
I went to the office.
❌ Voi mersesem mâine. (mixing a future auxiliary with a synthetic pluperfect)
Incorrect — you can't put an auxiliary in front of an already-finite pluperfect; for the future use 'voi merge'.
✅ Voi merge mâine.
I will go tomorrow.
Key Takeaways
- Synthetic = one inflected word (present merg, imperfect mergeam, perfect simplu mersei, pluperfect mersesem). Compound = auxiliary + non-finite form (am mers, voi merge, aș merge, o fi mers).
- The compound forms are the perfect compus, both futures, the conditional, the "perfect" of the future / conditional / subjunctive / presumptive (all fi + participle), and the passive (a fi
- agreeing participle).
- The big surprise: unlike every other Romance language, Romanian's pluperfect is synthetic — one word, no auxiliary (mersesem, not aveam mers).
- The split governs where the personal ending sits, where clitics attach, and where nu goes — so it's worth internalizing before the auxiliary and clitic pages.
Now practice Romanian
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Romanian→Related Topics
- 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.
- The Pluperfect (Mai-mult-ca-perfectul): OverviewB2 — An introduction to Romanian's one-word pluperfect — a single synthetic 'had done' tense (cântasem, plecase) that is unique among the Romance languages and fully alive in everyday speech.
- The Four Auxiliary Series ComparedB2 — Romanian's compound tenses run on four partly-overlapping auxiliary series — a avea, the future voi/vei/va, the conditional aș/ai/ar, and a fi — with genuine homography traps resolved only by what follows.
- 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.