Final answer:
In Spanish, when 'un millón' is followed by a noun, the phrase is "un millón de" and the noun remains singular, for example, "un millón de personas".
Step-by-step explanation:
When there is a noun directly after "un millón" in Spanish, the noun is always singular, and "un millón" is followed by "de", resulting in the phrase "un millón de". It is important to use this construction because "millón" is considered a collective noun that requires the preposition "de" to link to the noun that follows.
An example can help clarify this: "un millón de personas" (one million people), not "un millón personas". The noun following "un millón de" does not take the plural form because "millón" itself already implies a multiple quantity, so there is no need to pluralize the noun that comes after.
In Spanish, if there is a noun directly after "un millión," the noun should be plural. Here's an example:
Incorrect: Un millión libro
Correct: Un millón de libros
Similarly, if there is a number other than "un millión" followed by a noun, the number should agree in gender and number with the noun. For example:
Incorrect: Quinientas página
Correct: Quinientas páginas