The Eleven Inflectional Classes (Academy Classification)

If you read more than one Romanian reference book you will eventually hit a contradiction. One says Romanian has four conjugations; another says it has eleven classes. Both are describing the same language and neither is wrong. The four-way split is the traditional one, still taught in Romanian schools and used by every dictionary and online conjugator. The eleven-way split grew out of the descriptive turn taken by the Romanian Academy's Gramatica limbii române (2005, revised 2008) and its shorter companion Gramatica de bază a limbii române (2010), which describe verb inflection in terms of what the whole paradigm does rather than what the infinitive ending looks like. The eleven-class table is the shape that description has settled into in modern reference descriptions and conjugation databases. The classes have no official numbering, so the order shifts from book to book — but the eleven distinctions themselves are stable.

This page gives you the full eleven-class table, maps every class onto the label this guide uses elsewhere, and then spends most of its time on the one class the traditional four-way system genuinely hides — the one that contains a oferi.

Why two systems exist

The traditional four conjugations sort verbs by a single visible feature: the ending of the short infinitive (-a, -ea, -e, -i/-î). That is wonderfully easy to apply — you can classify a verb the second you meet it in a dictionary — but it is a weak predictor. Two Class IV verbs can conjugate completely differently (citesc vs dorm), and three Class III verbs can share every present-tense form while behaving differently in the past.

The Academy's classes sort verbs by the whole inflectional paradigm instead: which infix appears in the present, what the third person singular ends in, and how the perfect simplu and participle are built. That yields eleven classes, with the genuinely irregular verbs (a fi, a avea, a vrea, a lua, a da, a sta, a bea, a ști) pulled out and treated separately rather than jammed into a class they don't fit.

The eleven classes at a glance

The model verbs below are the conventional ones; expect the numbers to be shuffled if you meet this table elsewhere.

Read that right-hand column and you will see that this guide already teaches ten of the eleven — under different names, spread across the pages on the -ez infix, the -esc/-ăsc infix, plain -i verbs, -î verbs, Class II paradigms and Class III subtypes. The eleven-class scheme mostly puts names to distinctions you have already been drilling.

Classes 9, 10 and 11 are identical in the present

This is the first thing that confuses people about the eleven-class table: three of its classes look like exact copies of each other.

Same endings, same stress, same shape. The split happens outside the present, in the participle and the perfect simplu:

That participle axis — -ut / -s / -t — is exactly how the Class III subtypes page already organizes the class, because it is the split that actually earns its keep when you build past tenses.

Class 4: the third person in -ă

Here is the one place where the traditional four-class system leaves a real hole. Plain Class IV verbs are usually taught with a third person singular in -e: doarme, vine, fuge, simte. But a small set of -i verbs put -ă there instead — in both the third singular and the third plural — and one of them, a oferi, is a verb you will need early and often.

Note that a suferi adds a stem change on top: the e of the stem becomes ă in the first person singular, giving sufăr — not sufer. Some members of the class do that and some don't, and there is a reason; see below.

The whole class, in one table

The class is small enough to memorize outright, and it arrives in two families. One is built on the Latin -fer- root; the other is the -coperi family, and it contains two verbs you will meet in your first month.

Add a redescoperi (rediscover), which is just a descoperi with a prefix, and that is the class in practice. Note that most grammars stop at the -fer- verbs, which is why learners keep producing *descoperește — a descoperi and a acoperi belong here too, and they are far more frequent than a conferi.

Why some of them bend the vowel and some don't

Look at the eu column again. Sufăr, acopăr, descopăr turn the stem e into ă; ofer, difer, confer, refer leave it alone. That is not arbitrary — it tracks the verbs' history. A suferi, a acoperi and a descoperi are inherited: they came down to Romanian through centuries of spoken Latin, and the ordinary sound changes of that descent dulled the unstressed e to ă. A oferi, a diferi, a conferi and a referi are re-borrowings, taken back from Latin and French in the modern period; they arrived fully formed, missed those centuries of wear, and kept a tidy e. The old verbs are the bent ones. That single fact tells you which first person to expect for any verb in this class.

Class 5 for comparison

Set a fugi next to a oferi and the difference is visible in exactly two cells:

Class 5 keeps the bare stem in ei/ele (fug, matching eu); class 4 does not (oferă, not ofer). That second difference is easy to miss and worth drilling.

Irregulars sit outside the eleven

In the traditional scheme, a fi is filed under Class IV (its infinitive ends in -i, so the rule has no choice) and a avea under Class II, which tells you almost nothing useful about either. The Academy grammar declines to pretend: a fi, a avea, a vrea, a lua, a da, a sta, a bea and a ști are listed as irregular, outside the eleven classes, because no class label predicts their forms. If you have been learning those verbs whole rather than by rule, the Academy grammar agrees with you.

Which system should you use?

Use both, for different jobs.

• For talking to Romanians and reading Romanian materials, use the four conjugations. Schools teach them, dictionaries print them (DEX stamps vb. IV right after the headword), and every conjugator online is organized around them. Say conjugarea a IV-a and you will be understood.
• For predicting forms, the eleven classes are the better tool, because each one is defined by the behaviour you actually need — which infix, which third person, which participle.

The practical takeaway is not to memorize eleven numbers. It is to stop treating "Class IV" as a single answer. When you meet a new -i verb, three questions settle it: does it take -esc? Does the third person end in -e or -ă? Does ei/ele match eu? Those three questions are what the Academy's classes 4, 5 and 6 encode.

Common mistakes

Key takeaways

• Describing verbs by the whole paradigm rather than the infinitive ending — the approach of the Academy grammars (2005/2008 and the 2010 short grammar) — yields eleven inflectional classes plus a separate irregular group. It is a better description, not a correction.
• Romanian schools, dictionaries and conjugators still use the four conjugations — keep those labels for communication.
• Classes 9, 10 and 11 are identical in the present; they split on the participle (-ut / -s / -t).
• Class 4 is the one the traditional system hides: -i verbs with no infix and a third person in -ă — a oferi, a suferi, a diferi, a conferi, a se referi, a acoperi, a descoperi.
• Inside that class, the inherited verbs bend the stem vowel in the first person (sufăr, acopăr, descopăr) while the modern borrowings do not (ofer, difer, confer, mă refer).
• a fi, a avea, a vrea, a lua, a da, a sta, a bea, a ști are irregular and belong to no class — learn them whole.