Paragraph 1 ('Dear Professor Hart,') Greeting Paragraph 2 ('I'm writing to let you know ...') Reason for writing, i.e. the problem Paragraph 3 ('I have medicine ...') Supporting facts and details Paragraph 4 ('Until then, ...') The solution to the problem (including asking for help, if needed) Paragraph 5 ('Thank you for ...') Closing phrase Paragraph 6 ('Regards, Jameela') Sign off