Ellos son los contactos con quienes queremos colaborar.

Questions & Answers about Ellos son los contactos con quienes queremos colaborar.

Why is it quienes instead of quien?
Quienes means "who" or "whom." We use the plural form quienes because it refers back to los contactos (the contacts), which is plural. If it were just one contact, we would use quien.
Can I put the word con at the end of the sentence, like we often do in English?
No, Spanish never ends a sentence with a preposition! You must always keep the preposition (con) right before the relative pronoun (quienes). You have to build the sentence like the formal English phrasing: "the contacts with whom we want to collaborate."
Could I just use que instead of quienes after con?
When referring to people immediately after a preposition (like con, de, or a), you generally need to use quien or quienes. Using que after a preposition is mostly reserved for objects or things, not people.
Why is colaborar left in its infinitive form instead of being conjugated?
Because it directly follows another verb that is already conjugated: queremos (we want). In Spanish, when two verbs are chained together like this, only the first verb changes to match the person doing the action. The second verb stays in its dictionary form.

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