CAN, CAN'T, COULD, COULDN'T & BE ABLE TO, MAY, MIGHT, NEED, OUGHT TO.

CHART: http://anasenglishactivities.blogspot.com/2008/03/modal-verbs.html

https://www.perfect-english-grammar.com/modal-verbs-of-ability-exercise-1.html
https://elt.oup.com/student/result/engpreint/a_grammar/unit03/3b_2?cc=global&selLanguage=en
https://learnenglish.britishcouncil.org/es/english-grammar/can-or-could
https://nyelvkonyvbolt.hu/uploads/files/mygrammarlab_inter_samples.pdf
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-91443.php


MAY AND MIGHT
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-48099.php
https://learnenglish.britishcouncil.org/es/category/grammar/grammar-may-might


NEED, OUGHT TO

https://www.examenglish.com/grammar/A2_ShouldOught.htm
https://www.englishspanishlink.com/ejercicios-ingles/should-ought_2.htm
http://www.ejerciciodeingles.com/verbos-modales-should-ought/