1. The document introduces comparative forms such as taller, older, and stronger to describe differences in height, age, and strength between people or animals.
2. Examples are provided to show how to use these comparative forms correctly in sentences, such as "Zhang Jie is shorter than Yao Ming" and "Panghu is stronger than Daxiong."
3. Students are assigned homework to practice asking about and comparing heights, weights, and ages of their classmates using comparative sentences.