# 42. Future Perfect Tense

> Source: [A Complete Guide To Every Fundamental In Spanish (The Conclusion)](https://youtube.com/watch?v=YHDZSHCt1DE&t=11647s)

The future perfect (`futuro perfecto`) talks about what *will have* happened by some point in the future. It uses the future of `haber` + a past participle.

## Key Rules
- Formula: **future of `haber`** (`habré, habrás, habrá, habremos, habréis, habrán`) + **past participle**.
- The endings of `haber` mirror the regular future endings (`-é, -ás, -á, -emos, -éis, -án`); only `habremos` lacks an accent.
- Frequently used with **time expressions**: `para` + time = "by"; `dentro de` + time = "within".
- `haber + participle` remains inseparable: pronouns and negatives precede `haber`.
- Rare in everyday conversation; useful to recognize.

## Conjugation / Pattern Tables

### `haber` (future)
| Pronoun | Form |
|---|---|
| yo | habré |
| tú | habrás |
| él/ella | habrá |
| nosotros | habremos |
| vosotros | habréis |
| ellos | habrán |

## Examples
| Spanish | English |
|---|---|
| Para el lunes, yo habré terminado mis tareas. | By Monday, I will have finished my tasks. |
| Dentro de un año, tú habrás dejado tu trabajo. | Within a year, you will have left your job. |
| Para esa fecha, John habrá recibido muchas ofertas. | By that date, John will have received many offers. |
| Para mañana, nosotros habremos llegado. | By tomorrow, we will have arrived. |
| Dentro de dos horas, ellos habrán comido. | Within two hours, they will have eaten. |
| Para el verano, yo habré aprendido español. | By summer, I will have learned Spanish. |
| Para diciembre, ella habrá vuelto. | By December, she will have returned. |
| Para esa hora, habremos visto la película. | By that time, we will have seen the movie. |

## Notes & Gotchas
- Used for actions guaranteed to be completed by a future point.
- Conversationally infrequent — most speakers use the simple future or `ir a` + infinitive.
- Like all `haber` constructions, the participle stays in masculine singular (`terminado`, not `terminada`).
- Can also express probability/speculation about the recent past: `Habrá llegado ya` (He must have arrived by now).
