hättet
Hättet is the Konjunktiv II (subjunctive II) form of the verb haben for the second-person plural (ihr). It is used to express hypothetical or contrary-to-fact situations, most often in conditional clauses introduced by wenn, or in polite or speculative statements. When combined with another verb’s past participle, hättet forms the perfect subjunctive meaning “would have …” (for example, ihr hättet es gewusst – you would have known it).
Grammatical notes: The full Konjunktiv II forms of haben are ich hätte, du hättest, er hätte, wir
Usage and examples: Wenn ihr mehr Zeit hättet, würdet ihr länger bleiben. Wenn ihr mehr Zeit hättet,
See also: Konjunktiv II, German mood, conditional constructions.