教学片段一:师:今天王老师给大家带来了一张照片,不过我先不给你们看,先让你们来猜猜。照片有两个爸爸两个儿子。请你猜猜照片上至少几个人?生:3个。师:你是怎么想的?生:儿子的爸爸是一个爸爸,爸爸的爸爸又是一个爸爸,所以有两个爸爸。爷爷的儿子是一个儿子,爸爸的儿子又是一个儿子,所以有两个儿子。师:正像同学所说的,爸爸或儿子是不能随便叫的,是相对于另一个人而言的。得说清楚谁是谁的爸爸,谁是谁的儿子。 Fragment one of the teaching: Teacher: Today, Teacher Wang brought everyone a picture, but I will not give you a look, let you guess first. Photos There are two dads and two sons. Guess you guess at least a few people on the photo? Students: 3. Teacher: How did you think? Health: son’s father is a father, father’s father is a father, so there are two dads. Grandpa’s son is a son, father’s son is a son, so there are two sons. Teacher: As my classmates said, father or son can not be called casually, relative to another person. Have to say who is the father, who is who the son.