Learn Spanish (Latin America): Habremos colonizado la galaxia con las naves que construimos. - We will have colonized the galaxy with the ships that we built.

It is made of two parts: habremos, which is the future tense of the helper verb haber (meaning 'we will have'), and colonizado, the past participle of the verb colonizar ('colonized'). Together, they form the future perfect tense to talk about an action that will be completed before a certain point in the future.

Should colonizado change to colonizada to match the feminine word la galaxia?

No. When you use a past participle like colonizado with the verb haber to form compound tenses, it always ends in -o. It never changes to match the gender or number of the subject or the object.

Wait, doesn't construimos mean 'we build' in the present tense? Why is it translated as 'we built'?

It can mean both! For verbs ending in -ir like construir, the nosotros (we) form is exactly the same in both the present tense and the preterite (simple past) tense. You have to rely on context to know whether construimos means 'we build' or 'we built'.

Does the word naves only mean spaceships?