These two essential verbs are very irregular in the “simple past” tense. BUT – they’re exactly the same! Saying was or went, is usually written the same.
|I was||eu f||ui|
|you/he/she were (was)||você/ele/ela f||oi|
|I went||eu f||ui|
|you/he/she went||você/ele/ela f||oi|
* More accurately called, the preterit indicative tense.