Polite Modals

Video

https://www.youtube.com/watch?v=ZP1_uGBT6ns
https://www.youtube.com/watch?v=QWBwCoecvkM

Exercises

http://www.learnenglish-online.com/grammar/modals/tests/modalrequests.html

http://www.learnenglish-online.com/grammar/modals/tests/modaltest2.html

https://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/330-modals-polite.htm

https://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/330-modals-polite1.htm

http://www.english-at-home.com/speaking/making-requests/

http://www.funteaching.it/project/engl2005/basic/Could%20you.htm

http://www.esl-lounge.com/student/grammar/3g2-could-i-could-you.php

http://usefulenglish.ru/grammar/modal-verbs-exercise-four

https://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/330-modals-polite1.htm

https://www.montsemorales.com/gramatica/OffersReq.htm