Estas maletas son pesadas or (pesados)
Estas maletas son pesados or pesadas?
These suitcases are heavy.
3 Answers
pesadas (Subject-Adjective agreement in gender and number)
If you talk about the nature of these suitcases alone without being loaded with anything, then "....... son pesadas" is correct, but if you refer to these suitcases while they are filled with clothes, because in this case their weight can very due to how much clothing you put in them and because the clothes are not part of them, then you should use "....... están pesadas."
As Franco wrote, your adjective is describing your noun (and completely changing with it, unlike in English) so it has to match in number and gender.
Las palabras son similares (genderless adjective, still has to match in number)
Las oraciones son diferentes
Las maletas son pesadas
Los libros son livianos
El hombre es alto
La mujer es alta
Los hombres son altos
Las mujeres son altas
Esa película es aburrida
Esas películas son interesantes y cómicas
