More on present tenses (and irregular verbs)

http://harambecorsoitaliano.pbworks.com/w/page/16709747/Presente%20indicativo%20regolare%20-%20esercizi

http://parliamoitaliano.altervista.org/i-verbi-regolari-al-presente/

http://www.grammaticaitaliana.net/lezioni-ed-esercizi/lezione-09-indicativo-presente.html

http://www.zanichellibenvenuti.it/wordpress/?p=314

http://www.zanichellibenvenuti.it/wordpress/?p=338

http://italian.tolearnfree.com/free-italian-lessons/free-italian-exercise-80858.php

http://www.oneworlditaliano.com/english/italian-verbs/italian_irregular_verbs_in_the_present_simple_tense.htm