Activities and Repeated Events
The imperfective aspect (несвршени вид) presents an event without focusing on its end point. Use it whenever you talk about an action currently in progress (durative: 'I am reading') or a routine repeated over time (habitual: 'I read every day').
How It Works
In Serbian, grammatical aspect is an inherent lexical feature of verbs. The imperfective aspect (несвршени вид) is used when the speaker views an action from within, without regard to its boundaries or completion.
The two core functions of the imperfective aspect are:
- Ток радње (Ongoing duration / process): Describes an activity unfolding continuously over time. This corresponds to English progressive tenses (e.g., Учим српски – 'I am studying Serbian'; Седели смо и разговарали – 'We were sitting and talking'). In independent main clauses, only imperfective verbs can express an action happening right now at the present moment of speech (прави презент); perfective presents cannot be used this way.
- Понављање радње (Habitual / repeated action): Describes customary, iterative actions occurring regularly over an indefinite period (e.g., Сваког јутра устајем рано – 'Every morning I get up early').
Morphological Forms:
Imperfective verbs can be simple roots (радити, читати, пити) or derived from perfective stems using specific suffixes such as:
- -ва- / -ава- / -јава-: e.g., продати → продавати, or with jotation and epenthetic л after labials: употребити → употребљавати.
- -ива-: e.g., преписати → преписивати.
- -ја-: e.g., оставити → остављати (with epenthetic л), убити → убијати.
- -а-: often accompanied by root vowel lengthening or consonant alternations, e.g., скочити → скакати.
Syntactic Characteristics:
- Duration phrases: Imperfective verbs combine with bare accusative duration expressions to show how long an activity lasted / went on (without implying completion): сат времена ('for an hour'). By contrast, completed time to achieve an end result uses за + accusative.
- Phase verbs: Only imperfective verbs may follow verbs of beginning, continuing, or stopping: почети, наставити, престати (e.g., почео је да чита, never *почео је да прочита).
- Bi-aspectual verbs: Certain verbs like ручати, вечерати, чути, or loanwords in -овати (организовати) can be imperfective or perfective depending entirely on context.
Important Nuance: While imperfective verbs are the standard way to express habits, recurring actions can also appear with perfective verbs inside conditional or distributive clauses introduced by conjunctions like кад год ('whenever') or with distributive prefixes.
Examples (5)
- Док је напољу падала киша, седели смо у соби и читали књиге.
While it was raining outside, we were sitting in the room and reading books.
Word by Word: While is outside fallen rain, sat were in room and read books.
All three verbs ('падати', 'седети', 'читати') are imperfective, portraying simultaneous ongoing processes unfolding over time.
- Марко већ годинама сваког јутра трчи поред реке.
For years now, Marko has been running along the river every morning.
Word by Word: Marko already for-years every morning runs along river.
The imperfective verb 'трчати' expresses a habitual, recurring routine combined with the frequency expression 'сваког јутра'.
- Милена је сат времена писала поруку својој сестри.
Milena spent an hour writing a message to her sister.
Word by Word: Milena is hour of-time written message to-her sister.
The open duration phrase 'сат времена' in the accusative combines naturally with the imperfective 'писати' to focus on the activity rather than completion.
- Увече обично пијем чај и гледам вести на телевизији.
In the evening I usually drink tea and watch the news on television.
Word by Word: In-evening usually I-drink tea and I-watch news on television.
Regular daily habits in independent present-tense clauses strictly require imperfective verbs ('пити', 'гледати').
- Студенти су управо почели да раде тест.
The students have just started taking the test.
Word by Word: Students are just started to they-work test.
Phase verbs like 'почети' require an imperfective complement ('радити'), denoting the initiation of a durative process.
Common Mistakes
'Устанем' is fine in a list of steps, but 'устајем' is the plain way to state a habit.
Different MeaningСваког јутра устанем у седам сати.Сваког јутра устајем у седам сати.'Сваког јутра устанем у седам сати' is understood, and the perfective present is common when you list a routine step by step ('устанем, оперем зубе, доручкујем'). To simply state a repeated habit, use the imperfective: 'Сваког јутра устајем у седам сати'.
Using a perfective verb after phase verbs of starting, continuing, or stopping
Почео је да прочита књигу пре спавања.Почео је да чита књигу пре спавања.Phase verbs such as 'почети' (to start) and 'престати' (to stop) focus on entering or leaving a process and strictly take imperfective complements ('читати').
Using an open accusative duration phrase with a perfective verb instead of an imperfective verb
Јуче сам прочитао књигу два сата.Јуче сам читао књигу два сата.Open duration phrases without prepositions ('два сата') measure the duration of an ongoing activity and must pair with an imperfective verb ('читао сам'). If you achieved completion, use 'за два сата' with 'прочитао сам'.
How It Connects
Learn This First
To understand how the imperfective aspect denotes unfolding duration or repeated events, learners need a general foundation in verbal aspect (imperfective vs. perfective) and familiarity with common frequency adverbs used to express repetition.
- Verb Aspect
Understanding the fundamental distinction between perfective and imperfective verbs is essential before examining the specific nuances of ongoing duration and iterative actions.
Level 2 - често / обично / сваки данDescribing Habits
Habitual time adverbs often co-occur with imperfective verbs to signal repeated actions, helping contextualize the aspectual choice.
Level 2
Related Patterns
- A Single Bounded Result
The counterpart pattern focusing on single, bounded actions that reach completion.
Level 3 - почети / наставити / престати + да + Present-Tense VerbBeginning Continuing and Stopping
Governing phase verbs that strictly require imperfective verbs to indicate starting, continuing, or ending an activity.
Level 3 - за сат времена / сат временаDuration and Time to Completion
Examines the syntactic difference between open-ended activity duration and bounded time-to-completion.
Level 3
Learn Next
Patterns that build on this one.
- Aspect Pairs With PrefixesLevel 3
- видети / чути + како / да + ClausePerception ComplementsLevel 4
- бити / бивати + Passive ParticipleStates and Repeated Passive EventsLevel 4
- Verbs With Two Aspect ReadingsLevel 5
- Conditional for Past HabitsLevel 5
- Perfective Present in Habitual ContextsLevel 5
- Aspect Negation and InferenceLevel 6