CONDITIONALS

http://www.englisch-hilfen.de/en/exercises_list/if.htm

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences

Zero and First Conditional

http://www.agendaweb.org/verbs/conditional-verbs-exercises.html

http://www.agendaweb.org/verbs/conditional-first-exercises.html

http://www.perfect-english-grammar.com/first-conditional-exercise-1.html

http://www.perfect-english-grammar.com/conditional-exercises.html

http://www.englishpage.com/conditional/conditional1.htm

First and Second Conditional

http://www.agendaweb.org/verbs/conditional-second-exercises.html

http://www.perfect-english-grammar.com/second-conditional-exercise-1.html

http://www.first-english.org/english_learning/if_clauses_conditional/60_if_clauses_test_type_1_type_2.htm

http://www.first-english.org/english_learning/if_clauses_conditional/61_if_clauses_tests_type_1_type_2.htm

Third Conditional

http://www.agendaweb.org/verbs/conditional-third-exercises.html

http://www.perfect-english-grammar.com/third-conditional-exercise-1.html

http://www.first-english.org/english_learning/if_clauses_conditional/40_if_clauses_type_3_exercises.htm

http://www.first-english.org/english_learning/if_clauses_conditional/42_if_clauses_type_3.htm

http://www.first-english.org/english_learning/if_clauses_conditional/46_if_clauses_type_3_online_exercises.htm

http://www.first-english.org/english_learning/if_clauses_conditional/47_if_sentences_type_3_tests_exercises.htm

Mixing Conditionals

http://www.agendaweb.org/verbs/conditional-mixed-exercises.html

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences/exercises?05

http://www.myenglishpages.com/site_php_files/grammar-exercise-conditionals.php

http://www.perfect-english-grammar.com/first-second-third-conditionals-exercise.html

http://www.first-english.org/english_learning/if_clauses_conditional/63_if_clauses_tests_type_1_type_2_type_3.htm

http://www.first-english.org/english_learning/if_clauses_conditional/66_if_clauses_conditional_exercises_test.htm

http://www.first-english.org/english_learning/if_clauses_conditional/67_if_conditional_multiple_choice.htm

http://www.agendaweb.org/verbs/conditional-mixed-upper-intermediate-exercises.html

http://www.agendaweb.org/verbs/conditional-mixed-advanced-exercises.html