Learn Portuguese (Portugal): Ninguém abre a colmeia, exceto eu e o apicultor. - Nobody opens the beehive, except me and the beekeeper.

Prepositions that indicate an exception, such as exceto, salvo, and tirando, break the normal rule. They must be followed by subject pronouns (like eu or tu) rather than prepositional object pronouns (like mim or ti). You can think of it as a shortened clause: nobody opens it except I do.

Could I use words like salvo or menos instead of exceto?

Yes, you could perfectly say salvo eu or menos eu. They follow the exact same rule of using the subject pronoun. In fact, menos is the most common choice in casual, everyday spoken Portuguese.

Why is the verb abre in the singular when the exception involves two people (eu e o apicultor)?

The verb abre strictly agrees with the grammatical subject of the sentence, which is Ninguém. Pronouns like Ninguém and Alguém always take the third-person singular form. The phrase containing the exception does not change the main verb's conjugation.

Since Ninguém means nobody, shouldn't there be a não before the verb to make a double negative?