The 3 Conditionals:

https://docs.google.com/a/canada-english.com/document/d/1Stx5sKoki5AHJzNzMnJPKTnKMB82X6KFtK0Dr92Df5g/edit?hl=en_GB&authkey=CKnshdwI

Click on this link for an explanation and examples of the 1st Conditional

http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/1cond.htm

...and this link for the 2nd Conditional:

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/2cond.htm

follow this link if you want to do exercises for the second conditional:

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/2cond1.htm

...and this link for the 3rd Conditional

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/3cond.htm