Vídeo com explicação: https://www.youtube.com/watch?v=_AE5iQr5fFk
Link 1: https://www.learnenglishfeelgood.com/grammar-firstconditional1.html
Link 2: https://www.esl-lounge.com/student/grammar/2g24-first-conditional-exercise.php
Link 3: https://www.e-grammar.org/conditional-1-exercises-pdf/
