"Forgo" and "Forego"

Forgo = to give up, do without Forego = to go before As strange as it might sound, the past tense and past participles of these words are forwent/forgone and forewent/foregone. ...He forwent his chance to make a difference on that issue. ...Had you already forgone your chance to accompany him? ...It was a foregone conclusion. Happy punctuating! Margie