dvojí / trojí

Kind Numerals Dvojí and Trojí

Level 4

The numerals dvojí (two kinds of) and trojí (three kinds of) are used to count varieties or types, answering the question 'kolikerý?' (of how many kinds?).

How It Works

The kind numerals (druhové číslovky) dvojí, trojí, and obojí (both kinds) are an essential part of everyday Czech, but they carry specific nuances that advanced learners must understand.

1. Meaning, Abstract Nouns, and Mass Nouns
Strictly speaking, they count varieties. For example, dvojí boty means "two different kinds of shoes" (e.g., winter boots and summer sandals). They can be used to count varieties of uncountable substances (mass nouns) in the singular, such as dvojí sýr (two kinds of cheese). However, in modern spoken Czech, the analytic construction dva druhy + genitive (e.g., dva druhy sýra) is overwhelmingly preferred and serves as a highly natural, practical workaround for learners. Furthermore, modern corpus data shows that when combined with abstract nouns, they often lose the "variety" nuance and act as simple cardinal numbers expressing quantity or manner. For instance, vést dvojí život means "to lead a double life," and trojí výklad simply means "three interpretations."

2. Morphology
These numerals attach directly to nouns and must agree with them in gender, number, and case. They decline exactly like soft adjectives (following the paradigm jarní). This makes their endings highly uniform across genders (e.g., dvojí for all genders in the nominative, dvojího in the genitive masculine/neuter).

3. The Crucial Distinction: Kinds vs. Sets
Learners overwhelmingly confuse dvojí/trojí with the set numerals (souborové číslovky) dvoje/troje. Prescriptive grammar strictly separates them:

  • dvoje/troje (ending in -e): Counts sets, pairs, or plural-only nouns (pluralia tantum). Mám dvoje boty. = I have two pairs of shoes. For plural-only nouns, this is the standard way to count: dvoje dveře = two doors.
  • dvojí/trojí (ending in -í): Counts kinds or varieties. Mám dvojí boty. = I have two kinds of shoes. For plural-only nouns: dvojí dveře = two kinds of doors.

Crucially, this morphological distinction between -e and -í only exists in the nominative and accusative cases. In all plural oblique cases (genitive, dative, locative, instrumental), the forms are identical (neutralized), e.g., s dvojími botami (with two pairs/kinds of shoes). Furthermore, because set numerals (dvoje/troje) only exist in the plural, this confusion only happens with plural nouns. When counting uncountable mass nouns in the singular (like dvojí sýr), there is no set-numeral equivalent. This exact same distinction applies to obojí (both kinds) and its set counterpart oboje (both sets/pairs).

While native speakers sometimes use dvoje/troje for kinds in casual speech, the reverse is never true: dvojí/trojí cannot be used for sets. Note: Higher kind numerals like čtverý (four kinds) or paterý (five kinds) exist, but they switch to the hard adjective paradigm (mladý) and sound highly formal, literary, or archaic in modern Czech.

Examples (6)

  1. Máme dvojí sklenice — na víno a na vodu.

    We have two kinds of glasses — for wine and for water.

    Word by Word: We-have two-kinds-of glasses — for wine and for water.

    This is the strict, literal use of 'dvojí', indicating two distinct varieties of physical objects.

  2. Děláme výborný guláš z dvojího masa.

    We make an excellent goulash from two kinds of meat.

    Word by Word: We-make excellent goulash from two-kinds-of meat.

    Kind numerals can count varieties of uncountable mass nouns. Here, 'dvojího' is in the genitive case, agreeing with the neuter noun 'masa'.

  3. Mám rád obojí víno, bílé i červené.

    I like both kinds of wine, white and red.

    Word by Word: I-have glad both-kinds-of wine, white and red.

    The numeral 'obojí' (both kinds) follows the exact same logic and soft-adjective declension as dvojí and trojí.

  4. Ten text připouští trojí výklad.

    That text allows three interpretations.

    Word by Word: That text allows three-kinds-of interpretation.

    With the abstract noun 'výklad' (interpretation), 'trojí' functions more like a standard number indicating quantity rather than strictly 'three kinds of'.

  5. Na tohle nemůžeš mít dvojí metr.

    You can't have a double standard for this.

    Word by Word: On this you-cannot have two-kinds-of measure.

    A very common idiom in Czech. 'Dvojí metr' literally means 'two kinds of measure', translating to 'a double standard'.

  6. Dáš si kávu, nebo čaj? – Obojí.

    Will you have coffee or tea? – Both.

    Word by Word: Will-you-give to-yourself coffee, or tea? – Both.

    While 'obojí' can modify a noun, its most frequent use in everyday speech is as a standalone pronoun meaning 'both options' or 'both kinds'.

Common Mistakes

  • Using dvojí/trojí when you mean pairs or sets.

    Different MeaningKoupil jsem dvojí kalhoty.
    Koupil jsem dvoje kalhoty.

    Koupil jsem dvojí kalhoty is a good sentence, but it means 'I bought two kinds of trousers'. For two pairs of trousers, use the set numeral dvoje. Remember: -e for sets and pairs, -í for kinds.

How It Connects

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dvojí / trojíLevel 4Kind Numerals Dvojí and Trojí

Learn This First

To understand 'dvojí' and 'trojí', a learner must first be familiar with the basic cardinal numbers for two and three. Additionally, since these numerals decline like soft adjectives (ending in -í), knowledge of soft adjective agreement is essential for their correct usage in different cases and genders.

Words in This Pattern

dvojítrojí