It is known that methods of teaching the native language and those of teaching foreign languages are special fields of applied linguistics. A good grounding in linguistics is therefore the main qualification of a specialist in foreign language methods and he/she must concern himself/herself with keeping abreast of modern development in language didactics. Comparative, contrastive and confrontative linguistics should be widely applied in teaching foreign languages, this being in accordance with such principles of foreign language teaching as: consciousness, accessibility, durability, visualization, individualization etc. Comparison contributes to the thorough understanding of the material studied, since it causes the learner to observe and analyse the linguistic phenomena. These may be compared with other phenomena of the mother tongue, or with their counterparts in the foreign language. Didactics of foreign language is most closely related to linguistics, since linguistics deals with language and thinking, grammar and vocabulary and many others problems which are of paramount importance for didactics. The traditional approach to foreign language didactics is characterized by the use of the native language for explanation, retention and checking, the deductive explanation of grammar and the use of grammar exercises, the development of all the language skills, i.e., reading and writing, hearing and speaking from the beginning of the course. This approach is called traditional and we consider it the most scientific one. Thus in teaching a foreign language it is necessary to cope with the mother tongue of the pupils.  Fries Ch. in this context stresses the idea that "the most effective materials are those that are based upon a scientific description of the Language to be learned carefully compared with a parallel description of the Native Language of the learners". The comparative and contrastive studies of English and Romanian Phonetic and Phonological systems are keenly needed at present in the Republic of Moldova. Special, Experimental and Contrastive Phonetics of British and American English compared with Romanian is directed at the elucidation of studying the Phonetic and Phonological systems of both languages in order to evaluate the similitudes and differences, the results of which should be of great use both from theoretical and practical point of view. To fulfill the intended tasks it is also necessary to get acquainted with the literature available on Phonetics (general, special and experimental), Comparative linguistics, to get to know the theoretical courses in Phonetics delivered in the institutions of speaking English countries, to work in the experimental laboratories to attend lectures of specialists in the given fields of science, to master the methods of teaching languages to foreigners (English, French, Russian, Romanian), to meet with scientists dealing with these problems, to exchange experience of teaching languages by specialists in foreign language didactics. This will give the possibility to gain a lot concerning problems interested in and returning home it is possible to disseminate the knowledge obtained in these countries, improve the methods of teaching languages in particular English, to be more exact, different aspects of the English language both theoretical and practical. The results of the theoretical and practical investigations obtained will be of great use in the Republic of Moldova, for creating new manuals which are in great demand at present. At the same time it is possible to combine the research work while in these countries with teaching English, Romanian and Russian at different institutions (higher or secondary) using the practice of teaching a foreign language. On the basis of our examined material we figure the following conclusions: learning a language both as a means of communication and as an object of scientific investigation presupposes the studying of all its aspects; within the language aspectual framework it is phonetics that plays the role of paramount importance since it presents the language material of expressing the words; in order to master a foreign language pronunciation and then other language sides consciously, it is necessary to study them in comparison with the native language, the teaching of a foreign language, must be based upon carefully selected contrastive materials; in teaching foreign languages the main and principal points are the pupil (class), the teacher and the books; the teacher of a foreign language needs a good command of the language he teaches and a sufficient knowledge of its phonic, graphic, grammar systems and vocabulary, a knowledge of pedagogics and psychology, a knowledge of teaching methods and techniques etc. This will allow the teacher to find the right approach to each particular situation and, thus to be really proficient.