The document discusses the difference between using "feel" and "have" in English. It states that "feel" should be used to describe symptoms like feeling sick, good, or bad, while "have" should be used to describe sicknesses and injuries like having a stomachache or sore knee. Both "feel" and "have" can be followed by a noun or adjective. The document then indicates there will be exercises to practice the difference between "feel" and "have."