https://www.ego4u.com/en/cram-up/tests/conditional-sentences-4
https://www.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Conditional_sentences/ZERO,_FIRST,_AND_SECOND_CONDITIONALS_kd1447hm
http://www.myenglishpages.com/site_php_files/grammar-exercise-conditionals.php
https://www.englisch-hilfen.de/en/exercises_list/if.htm
https://first-english.org/english_learning/if_clauses_conditional/66_if_clauses_conditional_exercises_test.htm
http://www.englishlessonsbrighton.co.uk/the-conditionals-rules-and-exercises/
https://www.englishpage.com/index.html
http://www.learnesl.net/conditional-sentences-exercises-with-answers/
https://www.learnenglishfeelgood.com/esl-english-grammar-exercises.html
https://www.e-grammar.org/if-clauses/
https://www.englishliteracysite.com/english-literacy-exercises.html
https://www.examenglish.com/grammar/index.html
https://www.learn-english-today.com/lessons/lesson_contents/exercises/ph-verb_q1-mixed-online.html
https://www.myenglishpages.com/site_php_files/grammar-exercise-phrasal-verbs.php
https://agendaweb.org/grammar/questions-interrogatives.html
https://www.e-grammar.org/irregular-verbs/
https://www.englisch-hilfen.de/en/exercises_list/phrasal.htm
https://www.ego4u.com/en/cram-up/grammar/phrasal-verbs
http://esl.fis.edu/grammar/index-q.htm
https://www.englishrevealed.co.uk