【正文】 n that language is the only tool. It also depends on many other nonverbal behaviors. Actually, social munication usually mixed two kinds of toolsverbal and nonverbal. When one is speaking, gesture, eyes movement, posture and facial expression are always acpanying voiced language. Repeating is the fuction of body language. All the movements including all the nonverbal behaviors are behaved as one aimdeepen the impression of meaning [15]. SubstitutingBefore languages were produced, people had to use a variety of gestures to explain what they want to say in order to municate better or live better. Obviously it became the main tool of munication, and now we see that some individuals use relative body language when they cannot or it is inconvenient to express their feeling to achieve the same results instead of oral language and written language. That is what we said of municative function. Sign languages that are used by the deaf and dumb, judging gesture that were used in sports petitions by the judges, gestures that were used by policemen who direct the cars and people on streets all belong to substitutable body language. What’s more, in daily life people shake hands to send their respect to others, waving hands to say goodbye, clapping hands to wele others. Communicative functions of body language are mainly used in the following situations: First, more simple and concise body languages are used to stress the main information. For example, in a petition, people around are very noisy, it39。 at this moment his friends want to point out his defects in words but were afraid of hurting his pride, so they use eye contacts to prevent him. Third, when words are unnecessary and it is better to be silent than saying anything, only eye contact or smile will be more useful. Fourth, because of the special environment, people can only use nonverbal munication. For example, policemen have a certain body language that can only be understood by them. When they are going to rescue a hostage they will use eye contacts or gestures to convey information in order not to be discovered by the criminals. ComplementingAccording to the psychologist Birdwhistell, the municative message conveyed by verbal behaviors in conversation only contains 30%, and the other messages are all conveyed by nonverbal means (basically body language). That is to say, sometimes the voiced languages were powerless and the nonverbal behaviors will plement these speech acts by eye contacts, facial expressions, gestures, postures, etc. These silent body languages start by remedy the powerlessness and inadequacies. British Prime Minister Churchill, who paid much attention to speech art, said in one of his lectures that our living level was higher than any other historical periods, we ate too much. Then he stopped and stared at the audience and pointed at his own big stomach and said: “This is the most powerful proof.”[2] Churchill used nonverbal acts twice to modify voiced language. First he stopped intentionally to cause the public39。s fullscaled qualities by distinguish different nonverbal language behaviors. What’s more, at the same time when a teacher praised someone, he would pat the student on the shoulder with a smiling face. All the behaviors are a plement to the oral words. Many examples exist in our daily lives. Suppose you are on a phone call, a friend es to visit you. You will nod your head or give a gesture or give him a glance to ask him to sit down and wait for you. We see sometimes information conveyed by nonverbal acts has no relation with oral words. That is to say, what we have said and what we have done are two different things. Thanks to these nonverbal behaviors especially the eye contact, facial expression, gesture, posture, etc. Language bees more symbolic, emotional and lively. ContradictingCompared with language municative functions, nonverbal behaviors are more reliable and accurate to convey information and record the decisive meaning in language environment. Because languages sometimes are insincere in one39。s heart. For example, you have received a present from your friend that you do not like. Though you will say, I like it very much happily, your facial expression will show that you are unhappy. That is to say, your facial expression contradicted with what you said. A boy told his mother lightly that it was not him who broke the vase, but he dare not look at his mother39。 eyes to ask them to pay more attention to class. When an English or American speaker is giving a lecture, his eye light will rove the hall to check whether the listeners are listening attentively. At the same time the listeners will greet him with their eyes to show they are listening to him with eager attention, however, when the Chinese are listening to a lecture, they will usually avoid such kind of munication as eye contact. So the foreigner will misunderstand that the listener are ignoring him and think that it is a kind of disrespect.Chapter II A Contrastive study of body language between Chinese and western countryBody language is a kind of symbol and is also a solid expression of one’s culture. China and Western countries have their own different social soil and cultural atmosphere. They have their own long history of independent development and special space, and each of them has its own distinct ethnic characteristics. Body language reflects the characteristics of a nation, it not only includes the nation’s historical and cultural background, it also contains the attitude for life of the nation。 they fly into a rage when they get angry while the Chinese businessmen are much steadier. Another example can show understanding of the facial expression is vital in business munication. A Chinese pany held a party in a hotel and invited their foreign customers, but the foreign friends broke up a glass with a heavy hand, so he felt very sorry and embarrassed, b