Need a little more practice with that irregular preterit ?
Try these exercises that should help.
2 Warm-ups or worksheets using the verbs : Venir, traer, decir , querer in Preterit.
1) worksheet 1 - 10 Choose the verb and fill in the sentence in the preterit ( venir,
traer, decir or querer.)
2) worksheet 2 - 12 Create sentences in the preterit following the model
3) an answer key for Choose the verb
4) an answer key for Create the sentence