o / po / při + Locative

Locative After O, Po, And Při

Level 2

The locative case is unique in Czech because it never stands alone—it always requires a preposition. In fact, o, po, and při make up three of the five prepositions that trigger the locative case, alongside v/ve and na. While you may know it for physical locations, the prepositions o (about), po (after/around), and při (during) show that the locative is also essential for discussing topics, time, and simultaneous activities.

How It Works

When using these prepositions, keep the following rules and nuances in mind to build fluency in Czech:

1. Locative Endings and Consonant Mutations
Nouns in the locative singular typically take the endings -e/-ě, -u, -i, or -ovi (used for masculine animate nouns, e.g., o klukovi, po psovi, o bratrovi). In the plural, the endings are -ech, -ích, or -ách (e.g., po horách, o lidech). The singular ending -e/-ě frequently causes the final consonant of hard-stem nouns to soften (palatalize). Key mutations include h → z (Praha → o Praze), k → c (ruka → po ruce), ch → š (střecha → po střeše), g → z (jóga → po józe), and r → ř (sestra → o sestře). Additionally, the consonants d, t, n soften to ď, ť, ň in pronunciation before the -e/-ě ending. The plural ending -ích also triggers consonant mutations (e.g., k → c in kluk → o klucích; ch → š in hoch → o hoších; h → z in vrah → o vrazích; g → z in kolega → o kolezích).

2. Personal Pronouns in the Locative
Personal pronouns have specific, sometimes irregular forms in the locative case that are frequently used with these prepositions. Examples include o mně (about me), po tobě (after you), and při něm (by/with him).

3. Pronunciation and Word Stress
Monosyllabic prepositions like o, po, and při form a single prosodic unit with the following noun. This means the word stress shifts to the preposition (e.g., PO obědě, O knize).

4. No Vocalized Forms
Because o, po, and při already end in vowels, they do not have extended forms for easier pronunciation (unlike v/ve).

5. Important Contrasts and Verb Government

  • při is exclusively locative: Unlike o and po, which can also take the accusative case depending on the context, the preposition při is exclusively used with the locative case and never takes any other case.
  • Verbs with po: Several common verbs strictly require po + locative, such as stýskat se po (to miss someone/something) and toužit po (to long for).
  • o + locative vs. o + accusative: Mluvit o (to talk about) takes the locative, but verbs like zajímat se o (to be interested in) require the accusative.
  • po + locative vs. po + accusative: While po with the locative means "after" or "along," po with the accusative expresses a physical or temporal limit/boundary (e.g., po kolena - up to the knees).
  • po vs. za: Po hodině means "after an hour has passed," whereas za hodinu (za + accusative) means "in an hour (from now)."
  • při vs. během: Při pairs with simultaneous actions (při jídle - while eating), while během + genitive pairs with broader timeframes (během víkendu - during the weekend).
  • Institutional/Spatial při: Při is also used to express affiliation with an institution or a concurrent state, such as studovat při zaměstnání (to study while employed) or při univerzitě (affiliated with the university).

Examples (5)

  1. Mluvíme o novém filmu.

    We are talking about a new film.

    Word by Word: We speak about new film.

    Used with 'o' to indicate the topic of conversation.

  2. Po obědě se budeme procházet po městě.

    After lunch, we will walk around the town.

    Word by Word: After lunch ourselves we will walk around town.

    Demonstrates both uses of 'po': time sequence (after lunch) and scattered spatial movement (around the town).

  3. Při práci rád poslouchám hudbu.

    I like to listen to music while working.

    Word by Word: During work gladly I listen music.

    Used with 'při' to show a simultaneous activity (listening to music happens at the same time as working).

  4. O víkendu pojedeme na chatu.

    We will go to the cottage on the weekend.

    Word by Word: On weekend we will go onto cottage.

    The preposition 'o' is used here to indicate a specific recurring time period.

  5. Po práci půjdeme na pivo.

    After work, we will go for a beer.

    Word by Word: After work we will go onto beer.

    A very common everyday phrase using 'po' for a time sequence.

Common Mistakes

  • Using 'při' for static physical locations.

    Čekám na tebe při nádraží.
    Čekám na tebe na nádraží.

    Learners often translate the English 'at' directly to 'při'. However, 'při' means 'during' or 'while' an activity happens. For physical locations like 'at the station', you must use 'na' or 'v'.

  • Forgetting consonant mutations in the locative case.

    Mluvíme o Praha.
    Mluvíme o Praze.

    The locative case often triggers consonant mutations at the end of hard-stem nouns (e.g., h → z, ch → š, k → c, r → ř). You cannot leave the noun in its nominative form.

  • Using 'po' (after) where you mean 'in an hour from now'.

    Different MeaningPřijdu po hodině.
    Přijdu za hodinu.

    'Přijdu po hodině' is a good sentence, but it means 'I will come after an hour has passed'. For 'in an hour from now', the usual choice is 'za' + accusative: 'Přijdu za hodinu.'

How It Connects

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o / po / při + LocativeLevel 2Locative After O, Po, And Při

Learn This First

To use the prepositions 'o', 'po', and 'při' correctly, you must first be familiar with the locative case endings, which are typically learned through basic locational prepositions like 'v' and 'na'. You also need a firm grasp of noun genders to select the appropriate endings for each word.

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opopři