MODAL VERBS
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Homework should 1. https://elt.oup.com/student/solutions/elementary/grammar/grammar_05_022e?cc=sk&selLanguage=sk
2. https://www.focus.olsztyn.pl/en-should-should-not-exercises.html#.XLcNxjD7TIU
3. https://www.esl-lounge.com/student/grammar/2g18-should-shouldnt-exercise.php
Must, mustn´t, have to, don´t have to
1. https://www.test-english.com/grammar-points/a2/have-to-dont-have-to-must-mustnt/
2. https://www.englisch-hilfen.de/en/exercises/tenses/have_to.htm
https://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/330-modals-not1.htm
https://www.englisch-hilfen.de/en/exercises/modals/must_not.htm