Follow these links to practice verbs with an irregular yo form. You only need to conjugate the verbs in brackets. Once you have finished click on the button "Resultado" to check if your answers are right or wrong. You have the opportunity to correct the wrong ones if you click on ¿Quieres volver a intentarlo?

http://pot-pourri.fltr.ucl.ac.be/gra/exercices/verbo/indicativo/verbos07/exe.cfm?serie=1
http://pot-pourri.fltr.ucl.ac.be/gra/exercices/verbo/indicativo/verbos07/exe.cfm?serie=2
http://pot-pourri.fltr.ucl.ac.be/gra/exercices/verbo/indicativo/verbos07/exe.cfm?serie=3
http://pot-pourri.fltr.ucl.ac.be/gra/exercices/verbo/indicativo/verbos07/exe.cfm?serie=4