Learn Spanish (Spain): Esta semana he estado triste. ¿Y si nos reinventáramos? - This week I have been sad. What if we reinvented ourselves?

The phrase ¿Y si...? followed by the imperfect subjunctive is used to make a hypothetical suggestion or propose an idea, meaning What if we...? or How about we...?. Using this past subjunctive form shows that the idea is a theoretical proposal rather than a concrete, immediate plan.

Why is there an accent mark on reinventáramos?

In the imperfect subjunctive, the nosotros (we) form always requires a written accent on the vowel immediately preceding the ending (such as the a in -áramos or the e in -iéramos). This ensures the spoken stress lands on the correct syllable.

Why does the first sentence use the present perfect (he estado) rather than the simple past (estuve)?

In Spain, the present perfect is used for actions that happen in a timeframe that is not yet finished. Because esta semana (this week) is still ongoing, you must use he estado. If it were a finished timeframe like la semana pasada (last week), you would use the simple past estuve.

Could I say he sido triste instead?

No, you must use estar to talk about states, moods, and emotions, like being sad (triste). If you used ser, it would sound like you are describing a permanent personality trait (a naturally gloomy person), which doesn't fit the temporary timeframe of this week.