从某种意义上讲,语言是一种行为.人们对于自己的语言行为,必须随着生活环境的变化加以改变或调整,使之能够适应不同语言交际目的或场合的需要.例如,在大庭广众作报告显然不同于在火车上为消磨时光而与旅伴所进行的闲聊,而向上司请示汇报工作又有别于朋友间的开怀畅谈.又如,成年人与小孩子交谈倾向于用儿语.这一方面是为了使自己所说的话明白易懂,另一方面是为了弥补年龄上的差距,增加亲密感. In a sense, language is a kind of behavior.People’s own language behavior must be changed or adjusted according to the change of living environment so that it can adapt to the needs of different language communication purposes or occasions.For example, Obviously, the report is different from chatting with traveling companions on the train for time-consuming, and reporting to the supervisor is different from talking and talking with friends. For another example, adults and children are inclined to speak in children’s language. On the one hand, it is intended to make one’s own words understandable and understandable, on the other hand, to make up for the differences in age and to increase intimacy.