MODAL VERBS: CAN- MUST

 STUDY: 

http://elinglesfacilahora.blogspot.com/2015/11/verbos-modales-el-uso-de-can-y-must.html

STUDY AND PRACTICE:

https://www.liveworksheets.com/worksheets/en/English_as_a_Second_Language_(ESL)/Modal_verbs/Modal_verbs_(can,_must)_xa489869en

PRACTICE: 

https://www.englishexercises.org/makeagame/viewgame.asp?id=7521

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-53510.php

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