The structure and functions of ETS GRAD

The urgency of computer-assisted technologies for teaching natural languages (NL), and first of all foreign languages, is constantly growing. To denote computer-assisted teaching NL a special term – CALL (Computer Assisted Languages Learning) has appeared and is widely used now. The chief disadvantage of the currently available systems of teaching NL is their moderate adaptivity to the learner’s individual characteristic features. To overcome the mentioned drawback, it is necessary to develop expert tutoring systems (ETS) which dynamically form a tutoring program in accordance with the learner’s being-trained level, in contrast to traditional computer systems functioning in conformity with a strict, preset scenario. The importance of mastering the grammar of the German language in the part of adjective declensions is conditioned by the fact that the knowledge about adjectives is used both for the synthesis, and for the analysis of a sentence in German. When a sentence in German is synthesized, the main task at studying an adjective is to determine its ending correctly. In case of analyzin