WILL, GOING TO, PRESENT CONTINUOUS

Here you have some links to practise the diferent tenses in future. Good luck!

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php
http://www.englishexercises.org/makeagame/viewgame.asp?id=4180
http://www.englishexercises.org/makeagame/viewgame.asp?id=2675
http://www.englishexercises.org/makeagame/viewgame.asp?id=4180

ZERO CONDITIONAL

Here you have a link with the explanation of the Zero Conditional and some time sentences, and an audio file to listen to the pronunciation

http://elcursoinglesonline.blogspot.com.es/2012/04/gramatica-ingles-zero-conditional.html

And here there's a link with some exercises.

http://perso.wanadoo.es/autoEnglish/gr.zero.i.htm

PERSONAL PRONOUNS

Here you have some exercises to practise the personal pronouns:
http://www.mansioningles.com/gram22_ej1.htm
http://www.theyellowpencil.com/topronombrespersonales3.html
http://www.theyellowpencil.com/mpersonales/mpersonales.html
http://www.mansioningles.com/gram18_ej1.htm
http://www.aprenderinglesfacil.es/2008/05/ejercicios-adjetivos-posesivos.html