Did
来自Big Physics
Old English dōn, of Germanic origin; related to Dutch doen and German tun, from an Indo-European root shared by Greek tithēmi ‘I place’ and Latin facere ‘make, do’.
wiktionary
etymonline
did (v.)
Old English dyde, past tense of do (v.). The only remainder in Germanic of the old linguistic pattern of forming a past tense by reduplication of the stem of the present tense. Far back in Germanic the equivalent of did was used as a suffix to make the past tenses of other verbs, hence the English -ed suffix (Old English -de).
