Breakdown of Der Retter wird in der Schlucht gesucht haben.
in
in
haben
to have
suchen
to look for
der
who, which, that (relative pronoun; die, das)
Questions & Answers about Der Retter wird in der Schlucht gesucht haben.
Does wird ... gesucht haben always mean an action will be completed in the future?
It can, but in everyday German, this tense (Futur II) is much more commonly used to express a strong assumption about the past. So, this sentence likely means "The rescuer probably searched in the gorge" rather than a strict future deadline.
How do the three verbs wird, gesucht, and haben work together here?
To build this tense, you use a conjugated form of werden in the second position (here, wird). Then, the main action goes at the very end of the sentence as a past participle (gesucht), immediately followed by its helper verb in the infinitive (haben).
Why is the helper verb at the end haben instead of sein?
The verb at the end matches the helper verb you would normally use to form the past tense (Perfekt) of the main verb. Since you say Er hat gesucht (He has searched), you use haben for the Futur II as well.
Why is it in der Schlucht? Doesn't der mean it's a masculine word?
The word for gorge is actually feminine: die Schlucht. However, in is a two-way preposition. Because the rescuer is searching inside a fixed location (answering the question "where?"), we use the dative case. The dative form of die is der.