https://quizlet.com/_1e5cpn
https://www.esl-lounge.com/student/grammar/2g24-first-conditional-exercise.php
https://www.autoenglish.org/gr.con1.1.i.htm
https://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/1cond1.htm
https://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/2cond2.htm
https://www.perfect-english-grammar.com/second-conditional-exercise-1.html
https://www.focus.olsztyn.pl/en-second-conditionals-exercises.html#.WHvO9uJTKSo
https://www.better-english.com/grammar/con31.htm
https://englishgrammarsecrets.com/thirdconditional/menu.phphttps://www.perfect-english-grammar.com/third-conditional.html
https://www.englishtenses.com/exercise/first_or_second_conditional_quiz
https://baladre.info/english//sedaviwebfront/conditioneasy.htm