This document discusses the modal verb "should" and provides examples of its use when giving medical advice. It begins by asking the reader to recall common sicknesses like headaches, stomachaches, and fevers. It then asks what a person should and should not do if experiencing these illnesses. The document explains that "should" and "shouldn't" are used with the base form of a verb to give advice about medical issues. It provides examples like "You shouldn't watch TV, you should take an aspirin and sleep" for a headache. The rest of the document practices using "should" and "shouldn't" to recommend treatments for various health problems and their symptoms. It concludes by assigning vocabulary and exercises for students