Soft adjective agreement

Level 2

Soft adjectives (měkká adjektiva) are a group of Czech adjectives that end in -í in their dictionary form. Unlike hard adjectives, they look exactly the same for masculine, feminine, and neuter nouns in the nominative case.

How It Works

1. Identifying Soft Adjectives
While you often need to look at the dictionary ending, soft adjectives cluster around predictable categories. Common categories include animal adjectives (psí, kočičí, rybí [dog (adj.), cat (adj.), fish (adj.)]), time and seasons (jarní, letní, dnešní [spring, summer, today's]), spatial relations (hlavní, přední [main, front]), ordinal numbers like první [first] and třetí [third], and many foreign borrowings (especially those ending in -ní or -ivní) (inteligentní, moderní [intelligent, modern]).

2. Nominative and Vocative Agreement
In the nominative case, soft adjectives use -í for all genders in both the singular and plural:

  • Masculine: moderní muž [modern man] (sg) / moderní muži, moderní stroje [modern men, modern machines] (pl)
  • Feminine: moderní žena [modern woman] (sg) / moderní ženy [modern women] (pl)
  • Neuter: moderní auto [modern car] (sg) / moderní auta [modern cars] (pl). Note that soft neuter plurals stay -í, unlike hard adjective agreement which uses -á (never say *moderná auta).

The vocative case (used for addressing someone) is always identical to the nominative case for all genders and numbers.

3. Accusative Case
In the accusative, the adjective remains -í for almost everything (feminine, neuter, inanimate masculine, and all plurals). The only exception is the masculine animate singular, which takes -ího (e.g., vidím moderního muže [I see a modern man]).

4. Key Declension Rules

  • The Golden Spelling Rule: You will never write a hard y or ý in the endings of soft adjectives. They always use soft i or í.
  • Invariable Feminine: The feminine singular form is always -í, no matter the case (e.g., s moderní ženou [with a modern woman], not *moderníou).
  • Masculine and Neuter Singular: For masculine and neuter genders, oblique cases use soft endings like -ího, -ímu, and -ím. The ending -ím replaces both the hard instrumental -ým (s dobrým -> s jarním [with a spring one]) and the hard locative -ém (o dobrém -> o jarním [about a spring one]).
  • Plural Endings: All genders share the plural endings -ích (genitive and locative, e.g., bez jarních [without spring ones], o jarních [about spring ones]), -ím (dative, e.g., k jarním [to spring ones]), and -ími (instrumental, e.g., s jarními [with spring ones]), replacing the hard -ých, -ým, and -ými.
  • No Mutations: Unlike hard adjective agreement, soft adjectives do not mutate in the masculine animate nominative plural (e.g., cizí muži [foreign/strange men]).

5. Other Words Using Soft Declension
Note that all comparative and superlative adjectives (ending in -ší or -čí, e.g., starší, nejlepší [older, best]) and the possessive pronoun její [her] decline according to the soft adjective paradigm.

6. Spoken Czech
Soft adjectives are very stable in colloquial spoken Czech and keep their -í endings, unlike hard adjectives which often change. The main exception is the instrumental plural, which takes the Common Czech ending -íma (e.g., s moderníma lidma [with modern people]).

Examples (5)

  1. Na ulici jsem potkal cizího pána.

    I met a strange/foreign man on the street.

    Word by Word: On street am met foreign man.

    In the accusative masculine animate, the soft adjective takes the ending -ího.

  2. V létě nosím jen lehké letní oblečení.

    In summer I wear only light summer clothes.

    Word by Word: In summer wear only light summer clothes.

    Notice the contrast: 'lehké' is a hard adjective taking the neuter -é, while 'letní' is a soft adjective keeping its -í ending.

  3. Mluvili jsme o moderním umění.

    We talked about modern art.

    Word by Word: Talked are about modern art.

    In the locative case, the soft adjective takes the ending -ím.

  4. Dnešní oběd byl výborný.

    Today's lunch was excellent.

    Word by Word: Today's lunch was excellent.

    A soft adjective modifying a masculine inanimate noun in the nominative case.

  5. Bydlíme v hlavní ulici.

    We live on the main street.

    Word by Word: Live in main street.

    The feminine singular form remains -í even in the locative case.

Common Mistakes

  • Applying hard adjective endings to soft adjectives in the neuter nominative/accusative.

    To je krásné jarné ráno.
    To je krásné jarní ráno.

    Soft adjectives end in -í for all genders in the nominative. Never change the ending to -é for neuter nouns.

  • Trying to decline the feminine singular form.

    Mluvím s tou cizíou ženou.
    Mluvím s tou cizí ženou.

    The feminine singular form of a soft adjective is completely invariable. It remains -í in all seven cases.

  • Using hard adjective suffixes in oblique cases.

    Četl jsem o tom moderném umění.
    Četl jsem o tom moderním umění.

    Soft adjectives use soft suffixes (like -ím in the locative), not the hard suffixes (like -ém) used by hard adjectives.

How It Connects

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Soft adjective agreementLevel 2

Learn This First

To learn soft adjectives (měkká adjektiva), a learner must first understand the Czech noun gender system (masculine, feminine, and neuter). Soft adjectives are characterized by having the same ending (-í) for all three genders in the nominative singular, which contrasts with the hard adjective pattern. Therefore, recognizing the underlying gender of the noun is essential for correct declension in other cases.

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