Conditional Sentences

First Conditional

√ Grammar
√ Exercise 1
√ Exercise 2
√ Exercise 3
√ Exercise 4

Second Conditional

√ Grammar
√ Exercise 1
√ Exercise 2
√ Exercise 3
 

First and Second Conditional

√ Exercise 1
√ Exercise 2
√ Exercise 3

Third  Conditional

√ Grammar
√ Exercise 1
√ Exercise 2
√ Exercise 3
 √Exercise 4
√ Exercise 5

Zero  Conditional

√ Grammar
√ Exercise 1
√ Exercise 2

First, Second,Third and Zero Conditional Exercises

√ Exercise 1
√ Exercise 2
√ Exercise 3
 √Exercise 4
√ Exercise 5
√ Transformations/Rewriting

Alternatives to IF

√ Grammar
√ Exercise 1
√ Exercise 2
√ Exercise 3

Source

cristinacabal.com
http://www.englishgrammarsecrets.com
http://web2.uvcs.uvic.ca
http://www.perfect-english-grammar.com/
http://www.englishexercises.org/
http://elt.oup.com/
http://www.ego4u.com