CAN/ MUST

https://www.usingenglish.com/quizzes/401.html

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-2157.php


https://elt.oup.com/student/newhotline/grammar/start10.1?cc=global&selLanguage=en


https://www.englisch-hilfen.de/en/exercises/modals/must_not.htm

THERE IS/THERE ARE

https://www.usingenglish.com/quizzes/74.html

https://www.englishclub.com/grammar/subject-verb-agreement-there-is-there-are-quiz.htm


https://www.montsemorales.com/gramatica/thereisare.htm

https://agendaweb.org/exercises/grammar/there-is-there-are/index.html

https://www.englisch-hilfen.de/en/exercises/various/there_is_there_are3.htm


https://www.englisch-hilfen.de/en/exercises/various/there_is_there_are5.htm