personal pronouns

There are two types of personal pronouns:

subject pronouns (I, you, he, she, it, we, you, they) --> stand in front of the verb

object pronouns (me, you, him, her, it, us, you, them) -->stand after the verb

http://www.englisch-hilfen.de/en/exercises/pronouns/personal_pronouns3.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=1965
http://www.myenglishpages.com/site_php_files/grammar-exercise-object-pronouns.php
http://www.englishexercises.org/makeagame/viewgame.asp?id=999
http://www.ego4u.com/en/cram-up/grammar/pronouns/exercises?02

can and can't in sentences and questions

http://www.englishexercises.org/makeagame/viewgame.asp?id=1518
http://www.englishexercises.org/makeagame/viewgame.asp?id=5204
http://www.englisch-hilfen.de/en/exercises/questions/can2.htm
http://www.englishgrammarsecrets.com/can/exercise1.html
http://www.englishgrammarsecrets.com/can/exercise3.html
http://www.englishgrammarsecrets.com/can/exercise4.html