What is future perfect active indicative?
So, in English we capture both the futureness (will) and the perfectness (have). To form the future perfect active indicative, find the perfect stem (3rd principle part less the final "i"), and add the personal endings. Note: the personal endings are almost the same as the future of sum.
What is the future perfect subjunctive in Spanish?
The Spanish Future Perfect Subjunctive forms are used to describe actions that have happened, should have happened, or could have happened by some point in the future. Like all subjunctive forms, it is used in situations of uncertainty, doubt, desire, and emotion.