Gdybym wiedział, to bym przyszedł - do you know how to say that? PRACTICE THE 3rd CONDITIONAL

http://www.english-grammar-lessons.com/thirdconditional/exercise1.html
http://www.english-grammar-lessons.com/thirdconditional/exercise2.html
http://www.english-grammar-lessons.com/thirdconditional/exercise3.html
https://elt.oup.com/student/englishfile/intermediate3/grammar/file09/nef_int_grammar09_a01?cc=pl&selLanguage=pl
https://elt.oup.com/student/englishfile/intermediate3/grammar/file09/nef_int_grammar09_a02?cc=pl&selLanguage=pl