Learn Spanish (Latin America): Ese robot saldrá de la casa.

The verb salir (to leave) has an irregular stem in the future tense. Instead of adding the future ending to the full infinitive, it changes to the stem saldr-. Because robot is the subject, we add the third-person singular ending -á to get saldrá.

Why do we need the word de here when the English translation is just 'leave the house'?

In Spanish, the verb salir behaves more like 'to go out' or 'to exit'. Whenever you mention the specific place you are leaving, you must use de (from). So saldrá de la casa literally means 'will exit from the house'.

Why use Ese instead of Eso?

Ese is the masculine singular adjective for 'that', and it must be used when pointing out a specific masculine noun like robot. Eso means 'that' in a vague, abstract way (like 'that situation' or 'that thing') and is never placed directly in front of a noun.

Why does saldrá have an accent mark?

In the future simple tense, all endings except for the nosotros form carry a written accent mark on the final vowel. This shows that the spoken stress falls on the very last syllable.