Wik is completely correct. I would like to add to this that a phenomenon in Dutch is to simplify the conjugations (like you see with ''ried'' vs ''raadde''.) The last form (raadde) is more simpler so people tend to gradually replace them. Some other examples (for which currently both are usable): - to experience = ervaren - ik ervaarde/ervoer (both correct and used) - To want = willen - ik wilde/ik wou (wou in this case more informal but both are used) - to hunt = jagen - ik jaagde/joeg And so on. The verbs for which the past tense and perfect tense changes (ervoer, joeg, wou) are called ''sterke werkwoorden'' (strong verbs) and the ones for which it doesn't (-de/-te/-den/-ten) are called ''zwakke werkwoorden'' (weak verbs) but combinations of those also exist. You can the conjugations like Wik said in his answer.

"Ried" may be old Dutch, but is definitely not correct now. Past tense of "raden" ik raadde jij raadde hij raadde wij raadden jullie raadden zij raadden Same for "ontraden" ik ontraadde jij ontraadde hij ontraadde wij ontraadden jullie ontraadden zij ontraadden Use this website to find the conjugations of verbs: http://www.mijnwoordenboek.nl/ww.php/ (type in the full form of the verb. e.g.: "lopen", "dansen" etc.)