If, when and unless (Unit 8, 6º)

Here you can practice using if and unless:

https://www.myenglishpages.com/site_php_files/grammar-exercise-if-or-unless.php

https://www.englishgrammar.org/exercise-4/

https://www.usingenglish.com/quizzes/23.html

https://www.test-english.com/grammar-points/b1/first-conditional-future-time-clauses/

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-85665.php

https://www.grammarbank.com/if-unless-exercise-2.html

In these links, you can practice using when:

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-9388.php

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-114856.php