ἦσθα (estha)
ἦσθα is an Ancient Greek form of εἰμί, meaning “to be, exist”. It is the 2nd person singular imperfect active indicative.
Found 151 times in the Ancient Greek texts on Socratos.
Where it is used
Diogenes Laertius, Vitae philosophorum 4.6.31: … λευθα, ὡς αἶνος ἀνδρῶν, πάντοθεν μετρεύμενα. σῆμα δέ τοι τόδʼ ἔρεξεν ἀριφραδὲς Εὔγαμος, ᾧ σὺ πολλῶν πενεστέων ἦσθα προσφιλέστατος. Ἀπεδέχετο δὲ πάντων μᾶλλον Ὅμηρον, οὗ καὶ εἰς ὕπνον ἰὼν πάντως τι ἀνεγίνωσκεν, ἀλλὰ καὶ ὄρθρο …
Euripides, Helen 587: πῶς οὖν ἂν ἐνθάδʼ ἦσθά τʼ ἐν Τροίᾳ θʼ ἅμα;
All forms of εἰμί (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.