MODAL VERBS

 

https://agendaweb.org/verbs/modals-can-could-exercises.html

https://agendaweb.org/exercises/verbs/modals/should-shouldnt

https://test-english.com/grammar-points/a2/should-shouldnt/

https://www.englishexercises.org/makeagame/viewgame.asp?id=1734

https://elt.oup.com/student/solutions/elementary/grammar/grammar_05_022e?cc=co&selLanguage=en

http://www.focus.olsztyn.pl/en-should-should-not-exercises.html#.YDia5WhKggw

MODAL VERBS MUST vs. HAVE TO from OLGA TORRES SED SEC. EDUCACIÓN DE BOGOTA