Breakdown of Большая рыба иногда выпрыгивает из воды.
Questions & Answers about Большая рыба иногда выпрыгивает из воды.
Большая is the adjective большой (big / large) in the form that agrees with рыба.
Here it is:
- рыба = feminine
- singular
- nominative case
So the adjective must also be:
- feminine
- singular
- nominative
That gives большая рыба.
A very common thing in Russian is that adjectives must match the noun in gender, number, and case.
In Russian, nouns have grammatical gender. Рыба is a feminine noun.
A useful beginner rule is:
- many nouns ending in -а / -я are feminine
So рыба is feminine, which is why the adjective becomes большая, not большой.
Note that grammatical gender does not necessarily mean biological sex. Here рыба just belongs to the feminine noun class.