Question 1

Why is it segunda in the first half but noveno in the second half?

Accepted Answer

Ordinal numbers act like adjectives, so they must match the gender of the noun they describe. Clase is a feminine noun, so we use the feminine form segunda. Piso (floor) is masculine, so we use the masculine form noveno.

Question 2

Doesn't the letter o get dropped before masculine nouns? Why isn't it noven piso?

Accepted Answer

That rule only applies to primero (first) and tercero (third). They drop the final o to become primer and tercer right before a singular masculine noun. All other ordinal numbers, like noveno (ninth), keep their normal ending!

Question 3

I thought we used está for locations. Why does this sentence use es to say where the class is?

Accepted Answer

You normally use the verb estar to talk about where physical things or people are located. However, there is a special exception for events, like a class, a meeting, or a party. To say where an event takes place, you must use the verb ser (which gives us es here).

Question 4

Do ordinal numbers like segunda and noveno always go before the noun?

Accepted Answer

Yes! Unlike most descriptive adjectives in Spanish (which usually come after the noun, like in el gato negro), ordinal numbers almost always come right before the noun they describe.

La segunda clase es en el noveno piso.

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