Learn Portuguese (Portugal): Há assuntos a concluir até ao fim de semana? - Are there matters to complete by the weekend?

This is an adnominal modifier clause using the preposition a followed by an infinitive (concluir). It acts like an adjective describing the noun assuntos. In English, we translate it as "matters to complete" or "matters to be completed." This structure is very common in Portuguese to express an action that is pending or needs to be done to a noun.

Could I use para concluir instead of a concluir?

Yes, they are often interchangeable in this context! assuntos para concluir also means "matters to complete." However, using a + infinitive is a very natural and common way to attach a pending action directly to a noun.

Why is it até ao fim de semana instead of just até o?

In European Portuguese, the preposition até (until/by) is almost always paired with the preposition a when followed by a definite article. Since fim de semana is masculine, we combine the extra a with the article o to get ao, resulting in até ao.

Since assuntos is plural, shouldn't the first word be plural too?