The document provides instructions for adding "-ed" to verbs to make them past tense. It explains that adding "-ed" to most verbs changes them to the past tense, as if "Uncle Ed" performed the action in the past. It gives examples of adding "-ed" to common verbs like "walk", "pour", "talk", and "play" and forms sentences around them. Students are then asked to practice changing verbs like "jump", "climb", "finish", "fold", and "open" to past tense by adding "-ed" and using them in example sentences.