Second conditional

 

Czech explanation: https://www.helpforenglish.cz/article/2006051701-podminkove-vety-prehled

English explanation: https://www.really-learn-english.com/conditionals-in-english.html

On-line practice: 

liveworksheets

https://www.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Second_conditional/Second_conditional_vv1940686ko 

https://www.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Second_conditional/Second_conditional_vy181cc

https://www.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Second_conditional/Second_Conditional_Choose_the_Option_lu1298117hm

https://www.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Second_conditional/The_Second_Conditional_po6335zn

https://www.allthingsgrammar.com/second-conditional.html#

https://www.englisch-hilfen.de/en/exercises_list/alle_grammar.htm

Correcting mistakes:

https://www.esl-lounge.com/student/grammar/3g69-intermediate-first-second-conditional-error-correction.php

https://tefltastic.wordpress.com/worksheets/headway/hway-pre-u12/2nd-cond-supernatural-correction-discussion/

https://www.e-grammar.org/download/second-conditional-exercise-3.pdf