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y linked to the first signal system. Three months after the birth of the baby, crying of baby already has the significance of the second signal for adult, which expressed his feelings and requirements. After six months of birth, infants are contact with adults, can only use expressions and movements and other ways. With months of growth, this simple way of communication can not meet the development needs of the baby's control, such a contradiction to promote the occurrence of language. As we known, the development of children's language ability is extremely important. Childhood is the most rapid and critical period of a human lifetime to master the language, this period is the best period of development of children spoken. During this period, the children’ ability of imitating the language is the strongest; and the expansion of vocabulary is the fastest, oral comprehension and expression ability of the development is also very fast. During this period if they can get a good education and training of the language, not only pre-school children will be able to freely express their use of oral knowledge, intention, emotion, etc., but also lay a good foundation for lifelong learning. Specifically, can promote children's cognitive and communication skills, and lay a good foundation to adapt to society for the future. In additional, Can promote children's intelligence development, training and development their thinking ability. Finally, it can lay the foundation for children to learn the written language.

Various studies on child language, educators particularly concerned about the stages of language development of children, because we need to recognize changes in children's language development and continuity, as well as the characteristics at different times, grasp the growth pattern of Chinese children's language, which can targeted for language education. According to linguistic research, combined with the results of psychology, Children's language development can be divided into three periods. Erik Erikson at Harvard University, a psychoanalyst, Sigmund Freud in his theory of psychological development based on the interpretation put forward in 1950, the entire life course on psychosocial development theory, he think that human development is including biological, psychological, social change process in three areas. In childhood, the first period is Infancy (0-18months), the second is Early childhood (18months-3 years old), and the last is late childhood (3-6 years old).These three stages of childhood language development have different characteristics.
In the first period, infancy period, 18months to 3 years old. Children are in physical and mental developmental level. When born, the first in their life cycle, the baby's physical activity is mainly reflected, for example, you put your fingers into his mouth, he will be sucking reflex, the face of strong light, and they would shut eyes. As for the situation of listening and pronunciation, the baby has been able to feel the different voices from outside. But they like best is the voice of their mother, because mother's voice make they think about warm food, comfortable together. In addition, the baby will be aware of beautiful music, and they dance to the music, such as kick and so on. In part of emotional and social development, the child will spend more time look around and listen to their speech. His movements and facial expressions will become a true expression of p本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。