Using English Modal Verbs to make requests. This link has a situation table for using modal verbs.
.#English #Grammar - May vs. Can - Excellent resources for #Modals which confuse students! Get more English tips - sign up for my mailing list and get 3 Instant Bonuses to improve your English now! - http://www.businessenglishace.com/1
Can, Could, Able to, with online quiz
A Modal Verb Chart That Explains the Various Functions of Each Modal Verb - learn English,modals,english