XX.
Výjimky ve sklonění. Exceptions in declensions.
Dual. Dvojné číslo.
The old Bohemian had well developed forms of dual number, used when speaking of two things or persons. In modern Bohemian the dual survived only with some names of parts of body occurring in pairs (and with the numeral sto, hundred).
Feminine Gender.
Ruka—hand, noha—foot, declined in the singular like ryba.
When speaking of the following parts of the human body, however, the dual forms must be used:
| Nom., Ob. & Voc. | ruce | nohy |
| Possessive and Locative | rukou | nohou |
| Dative | rukám | nohám |
| Inst. | rukama | nohama. |