Present Stem and Conjugation Classes | Serbian Grammar

Serbian present forms are built on a present stem, which may differ visibly from the infinitive stem. The practical conjugation classes are named after the vowel before the ending in forms such as third-person singular чита, ради, and пише: the а-class, и-class, and е-class.

The classes make the endings predictable once you know the correct present stem. The genuinely difficult part is that an infinitive alone does not always tell you that stem. A strong dictionary habit is therefore to learn three forms: писати — пишем — пишу, not only писати.

One Ending System, Three Theme-Vowel Patterns

All regular presents distinguish six persons. The theme-vowel pattern is clearest in the third-person forms.

Person	а-class: читати	и-class: радити	е-class: писати
ја	читам	радим	пишем
ти	читаш	радиш	пишеш
он / она / оно	чита	ради	пише
ми	читамо	радимо	пишемо
ви	читате	радите	пишете
они / оне / она	читају	раде	пишу

The most useful diagnostics are third-person singular and plural:

а-class: -а / -ају
и-class: -и / -е
е-class: -е / -у

Свако јутро читам вести док пијем кафу.

Every morning I read the news while drinking coffee.

Моји родитељи раде викендом, али понедељком одмарају.

My parents work on weekends, but they rest on Mondays.

Пишемо вам јер још чекамо одговор.

We are writing to you because we are still waiting for a reply. (neutral/formal correspondence)

Serbian has no present ending equivalent to English third-person -s alone; every person has its own form. Conversely, Serbian does not need an overt subject pronoun when the ending and context identify the subject.

The а-Class

The а-class is highly transparent when the infinitive also ends in -ати and preserves the same stem: читати — читам, гледати — гледам, чекати — чекам.

Person	гледати (watch/look)
ја	гледам
ти	гледаш
он / она / оно	гледа
ми	гледамо
ви	гледате
они / оне / она	гледају

Гледаш ли још ону серију коју си ми препоручила?

Are you still watching that series you recommended to me? (addressing a woman)

The visual match between гледати and гледам is convenient, but not every infinitive in -ати belongs here. Писати — пишем, звати — зовем, and плакати — плачем belong to the е-pattern. Classify by the present, not by the last letters of the infinitive.

The и-Class

The и-class has -им, -иш, -и, -имо, -ите, -е. Many verbs in infinitive -ити belong here: радити — радим, говорити — говорим, носити — носим.

Person	говорити (speak)
ја	говорим
ти	говориш
он / она / оно	говори
ми	говоримо
ви	говорите
они / оне / она	говоре

Веома јасно говорите српски.

You speak Serbian very clearly. (polite/plural address)

Носим лаптоп јер после посла идем на предавање.

I am bringing my laptop because I am going to a lecture after work.

Some и-class verbs show consonant alternations elsewhere in their paradigms, but the present endings remain stable. Treat the class as a present-tense pattern, not as a promise that every form of the verb keeps an identical stem.

The е-Class

The е-class uses -ем, -еш, -е, -емо, -ете, -у. It contains many stem-changing verbs and several productive subpatterns:

Infinitive	1st singular	3rd plural	Meaning
писати	пишем	пишу	write
звати	зовем	зову	call
пити	пијем	пију	drink
путовати	путујем	путују	travel
доћи	дођем	дођу	come

Зовем те чим дођем до хотела.

I’ll call you as soon as I get to the hotel.

Лети често путују возом јер не воле да возе ноћу.

In summer they often travel by train because they do not like driving at night.

The alternations пис-/пиш-, зва-/зов-, путова-/путуј-, and дођ- are historical and morphological facts, not spelling decoration. There is no single beginner rule that safely predicts all of them.

💡

Record each new verb as infinitive + first-person singular + third-person plural: писати, пишем, пишу. The pair пишем/пишу identifies the е-class and exposes the stem you actually need.

Affirmative, Negative, and Question Forms

Ordinary present negation places separate не before the verb. A neutral yes/no question can use да ли plus the finite verb; ли after the verb is also natural, especially with a short initial verb phrase.

Милица данас ради од куће.

Milica is working from home today.

Милица данас не ради од куће.

Milica is not working from home today.

Да ли Милица данас ради од куће?

Is Milica working from home today?

Ради ли Милица данас од куће?

Is Milica working from home today?

Do not add an equivalent of English do/does. The Serbian finite verb remains inflected, and the question is marked by да ли, postverbal ли, or conversational intonation. A few high-frequency verbs have fused negative forms—нисам, нећу, немам, немој—which must be learned separately; the regular rule is still не + present.

Present Form Does Not Always Mean Present Time

Imperfective presents readily describe an action happening now or a habit.

Сад разговарам с клијентом; позваћу те касније.

I’m speaking with a client now; I’ll call you later.

Петком обично ручамо код мојих родитеља.

On Fridays we usually have lunch at my parents’ place.

Perfective verbs also have morphological present forms, but they usually do not describe an ongoing event at speech time. They commonly occur in subordinate clauses referring to a future boundary or in general statements about completed occurrences.

Кад завршим састанак, послаћу ти поруку.

When I finish the meeting, I will send you a message.

Here завршим is morphologically present but future in reference. The conjunction кад, aspect, and the future main clause jointly establish the reading. See Uses of the Present for the full range.

💡

Do not translate a Serbian present form automatically with English simple present. Context decides among I work, I am working, and—in a subordinate clause—future-oriented when I finish.

Practice Tasks

Task 1: Identify the Class

Use first-person singular and third-person plural to classify three verbs.

Читам — читају: а-класа. Радим — раде: и-класа. Пишем — пишу: е-класа.

I read—they read: a-class. I work—they work: i-class. I write—they write: e-class. Answer: the third-person plural endings -ају, -е, and -у confirm the classes.

Task 2: Build a Negative Question

Ask whether your friends are not working tomorrow.

Да ли твоји пријатељи сутра не раде?

Are your friends not working tomorrow? Answer: да ли introduces the question; regular negation places не before раде.

Common Mistakes

Classifying from the infinitive ending alone

❌ Писам ти сваке недеље.

Incorrect—писати is not conjugated like читати; its present is пишем.

✅ Пишем ти сваке недеље.

I write to you every week.

Using the wrong third-person plural ending

❌ Они радју до касно.

Incorrect—the и-class third-person plural of радити is раде.

✅ Они раде до касно.

They work until late.

Adding an English-style question auxiliary

❌ Да ли радити она данас?

Incorrect—Serbian does not use an infinitive like English ‘does work’; the finite verb must agree.

✅ Да ли она данас ради?

Is she working today?

Writing regular negation as one word

❌ Неразумем зашто чекамо.

Incorrect spelling—regular verbal не is written separately from разумем.

✅ Не разумем зашто чекамо.

I do not understand why we are waiting.

Reading a perfective present as an ongoing event

❌ Сада прочитам књигу два сата.

Incorrect for an activity in progress—perfective прочитам presents a bounded occurrence, not ongoing reading now.

✅ Сада читам књигу; завршићу је вечерас.

I am reading a book now; I will finish it tonight.

Key Takeaways

Serbian present conjugations organize into а-, и-, and е-patterns, visible especially in the third-person forms.
The infinitive does not reliably reveal the present stem: писати — пишем, звати — зовем.
Learn infinitive, first-person singular, and third-person plural together.
Regular negation is не + finite verb; questions use да ли, ли, or intonation without English do.
Imperfective presents can be current or habitual; perfective presents often have future reference in subordinate clauses.

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