Learn Spanish (Latin America): La casa blanca es buena.

In Spanish, descriptive adjectives like colors usually go after the noun they describe. So instead of saying 'white house' like in English, you put the noun first and say 'house white' (casa blanca).

Why do both 'blanca' and 'buena' end in the letter 'a'?

Adjectives have to match the gender of the noun they describe. Since casa is a feminine word (which we know from the word la), the adjectives change their default '-o' ending to an '-a'. That is why blanco becomes blanca and bueno becomes buena.

Since 'buena' comes after the verb 'es', does it still have to match 'casa'?

Yes! Even when an adjective comes after the verb (like es here), it still has to match the gender and number of the noun it is describing. Since it describes la casa, it must be the feminine singular form, buena.

Why do we use 'es' here instead of 'está'?

We use es (which means 'is') for permanent characteristics or basic descriptions of what something is. Since being a white house is a core trait rather than a temporary condition, we use es instead of está.