Ese reptil venenoso no es un animal marino.

Questions & Answers about Ese reptil venenoso no es un animal marino.

Why can't we say "muy marino" in this sentence?
Marino (marine) is a relational adjective here, meaning it classifies the animal as belonging to the sea. Relational adjectives generally cannot be graded with degree words like muy (very) or tan (so) because a noun either belongs to that category or it doesn't.
Could I put marino before the noun, making it "un marino animal"?
No. Because marino is a relational adjective that categorizes the noun, Spanish grammar strictly requires it to come directly after the noun it modifies.
What about venenoso? Does it follow the same strict placement rules as marino?
No, venenoso (poisonous) is a qualifying adjective, meaning it describes a characteristic rather than a strict category. While it normally goes after the noun for an objective description, it could technically be placed before reptil (e.g., ese venenoso reptil) for a dramatic, subjective, or literary effect.
Why do we use un before animal marino when Spanish often drops the article after es (like in "él es médico")?
While Spanish drops the indefinite article after the verb ser (to be) for unmodified professions, religions, or general categories, you usually must use un or una when the noun is modified by an adjective. Since animal is modified by marino, the un is required.
Why is it ese reptil and not eso reptil?
Ese is the masculine singular demonstrative adjective used right before a masculine noun like reptil. Eso is the neuter pronoun, which is only used for abstract concepts, general situations, or unknown objects, and it is never placed directly in front of a noun to modify it.

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