Modals for Rules and Obligation

  Modals for Rules and Obligations

Explaining the topic

Explanation Reference
https://www.ecenglish.com/learnenglish/lessons/modal-verbs-1-permission-prohibition-obligation-no-obligation
https://learnenglish.britishcouncil.org/es/quick-grammar/modals-1 

Listening Activity

Must, Have to, Need to
http://www.elllo.org/grammar/L3-CEFR-A2/L3-18-Modal-HaveTo.htm

Drilling Activity

Multiple Choice
http://www.learnenglish-online.com/grammar/modals/tests/modalobligation.html
http://www.autoenglish.org/modalverbs/ModalsObligation.htm

Fill in the gaps
https://www.perfect-english-grammar.com/modal-verbs-of-obligation-exercise-1.html