začít / přestat + Imperfective Infinitive
Phase Verbs with Imperfective Infinitive
When you say you "start" or "stop" doing something in Czech, the second verb (the infinitive) must always be imperfective.
How It Works
1. The Core Rule: Phase verb + Imperfective Infinitive
Even if you started and finished the action just once, the infinitive must be imperfective. The phase verb itself handles the boundary (the start or stop), while the infinitive describes the ongoing activity. Note: The verb for 'continue' (pokračovat) does not take an infinitive; it requires v + locative (e.g., pokračovat ve čtení). To express "keep doing" or "continue doing" an action, Czech typically uses the adverb dál (further) with a conjugated verb instead of an infinitive (e.g., četl dál - he kept reading). Similarly, the verb for 'finish' (skončit) does not take an infinitive in standard Czech. You must either use přestat + infinitive (e.g., přestal jsem pracovat) or skončit s + instrumental (e.g., skončil jsem s prací).
Examples:
• Začal jsem psát. (I started writing.) NOT *Začal jsem napsat.
• Přestal jsem kouřit. (I stopped smoking.)
• Zůstal stát. (He remained standing.) Note: As a phase verb, zůstat is mostly restricted to verbs of physical position like stát (stand), sedět (sit), ležet (lie), and viset (hang), as well as a few stative verbs of perception or inaction like zírat (stare), koukat (look), and mlčet (be silent). You cannot say *zůstal číst.
2. The Phase Verb's Aspect
While the infinitive is strictly locked to the imperfective aspect, the phase verb itself inflects normally and can be perfective or imperfective depending on the context:
- Začalo pršet. (It started raining - a one-time event, perfective phase verb začít)
- Vždycky začínalo pršet. (It always started raining - a repeated event, imperfective phase verb začínat)
- Přestal kouřit. (He stopped smoking - perfective phase verb přestat)
- Pomalu přestával kouřit. (He was slowly stopping smoking - imperfective phase verb přestávat)
3. Contrast with Modals
Do not confuse this rule with aspect after modal verbs (like muset or chtít). Modals can take both perfective and imperfective infinitives depending on your intended meaning. Phase verbs strictly require imperfective infinitives.
Examples (5)
- Začal jsem psát dopis.
I started writing a letter.
Word by Word: Started am to-write letter.
The phase verb 'začal' (started) is followed by the imperfective infinitive 'psát' (to write).
- Přestala kouřit před rokem.
She quit smoking a year ago.
Word by Word: Stopped to-smoke before year.
The phase verb 'přestala' (stopped) requires the imperfective infinitive 'kouřit' (to smoke).
- Najednou začalo pršet.
Suddenly it started to rain.
Word by Word: Suddenly started to-rain.
Even for a sudden, one-time event, the infinitive 'pršet' must be imperfective.
- Kdy přestaneš pracovat?
When will you stop working?
Word by Word: When will-stop to-work?
The future form of the perfective phase verb 'přestat' is paired with the imperfective infinitive 'pracovat'.
- Dítě začalo plakat.
The child started crying.
Word by Word: Child started to-cry.
The action of crying is a process, so the imperfective 'plakat' is used after 'začalo'.
Common Mistakes
Using a perfective infinitive because the starting action happened only once.
Začal jsem napsat ten e-mail.Začal jsem psát ten e-mail.Even if you only started writing the email once, the verb following a phase verb must be imperfective (psát). The perfective verb (napsat) cannot be divided into phases.
Confusing 'stopping' an action with 'completing' it.
Přestal jsem přečíst knihu.Přestal jsem číst knihu.'Přestat číst' means to stop reading (abandoning the process, possibly unfinished). If you mean you finished reading it to completion, you should use the lexical perfective verb 'dočíst' (Dočetl jsem knihu) instead of a phase verb.
Using an infinitive after the verb 'pokračovat' (to continue).
Pokračoval jsem číst.Pokračoval jsem ve čtení.Unlike English, where you can say 'continue to read', the Czech verb 'pokračovat' does not take an infinitive. Instead, it requires the preposition 'v' (in) followed by the locative case, usually with a verbal noun (e.g., ve čtení - in reading).
How It Connects
Learn This First
To learn phase verbs like 'začít' (to start) and 'přestat' (to stop), you must first understand the concept of verbal aspect (perfective vs. imperfective), as these verbs can only be followed by an imperfective infinitive to denote the beginning or end of a process. Additionally, you need to be familiar with the conjugation of these specific verbs and the general rule of using infinitives after auxiliary-like verbs.
- Basic aspect pairs
Understanding the distinction between perfective and imperfective verbs is essential because phase verbs specifically require the imperfective aspect.
Level 2 - čtu / čtešPresent Verbs Like Číst
The verb 'začít' follows the 'číst' conjugation pattern (začnu, začneš), which is necessary for using the phase verb in the present or future tense.
Level 1 - Aspect in infinitives after modal verbs
This pattern introduces the concept of choosing a specific verbal aspect for an infinitive following a governing verb, which is the core mechanic of phase verb constructions.
Level 2
Related Patterns
- Perfective aspect for completed action
Explains why perfective verbs represent indivisible wholes and therefore cannot follow phase verbs.
Level 2 - psal hodinu / napsal za hodinuDuration Versus Completion in Aspect
Contrasts the durative nature of imperfective verbs (needed for phase verbs) with the completion focus of perfective verbs.
Level 3
Words in This Pattern
Practice začít / přestat + Imperfective Infinitive in Bubblegum
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