... greatest achievement of humanity. It is the system of special signals which people use to communicate and it is the basis means of communication and of developing thought of people. People use ... are many kinds of language: language of music, language of science,language of art, etc. And they are used to communicate. Speech (and words) is the fastest and simplest method of communication. ... withpermissible degrees of directness, politeness, and formality and they affect many of functions of communication such as: offer, request, refusal, compliment, etc. Fordifferent functions of communication,...