IMPORTANT OF COMBINATORY-POSITION CHANGES IN TEACHING BY MEANS OF EXERCISES

Phonetics as a linguistic science has its own specific peculiarities as such having its object, methods of investigation, types, aspects and connections with linguistic and none linguistic sciences such as lexicology, stylistics and grammar. The main unit of phonetics is speech sounds, namely phonemes which are divided into two classes; vowels and consonants. Usually the distinction between a vowel and consonant is regarded to be not phonetic, but phonemic. From phonetic point of view the distinction between a vowel and a consonant is based on their articulatoryacoustic characteristics, i.e. a vowel is produced as a pure musical tone without any obstruction of the air-stream in the mouth cavity while in the production of a consonant there is an obstruction of the air-stream in the speech tract. Phoneme is a smallest meaningless unit of a language. Words, phrases and utterances are formed by means of phonemes. Every utterance is a continuous flow of speech interrupted by pauses. When we linguistically interpret this it means that in a speech continuum there appears a variety of realizations of one and the same phoneme, its allophones.