Form 8b. Modals

For practicing:
https://www.perfect-english-grammar.com/modal-verbs-of-ability-exercise-1.html;
https://www.perfect-english-grammar.com/modal-verbs-of-obligation-exercise-1.html;
https://www.perfect-english-grammar.com/modal-verbs-of-probability-exercise-2.html;
https://www.english-grammar.at/online_exercises/modal-verbs/m005-must-mustnt-neednt.htm;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-87468.php;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-97711.php;
https://www.englisch-hilfen.de/en/exercises/modals/form.htm;
https://www.englishgrammar.org/modal-auxiliary-verbs-exercise-6/;
https://www.myenglishpages.com/site_php_files/grammar-exercise-modals.php.
QUIZ
http://esl.fis.edu/grammar/multi/modal1.htm.