english sound structure part 16. Bài tập luyện ngữ pháp tiếng anh cho mọi người, đây là tài liệu hay và hữu ích có thể giúp các bạn có thể nắm vững được các ngữ pháp tiếng anh cụ thể. | 198 Licensing 65 t - C i Brace notation was originally introduced into the SPE-type framework to allow j rules with overlapping structural descriptions to be collapsed. In 65 there are J two sub-rules one applying before C the other before I. The notation is be 1 interpreted in such a way that both subparts apply a convention known as 1 conjunctive rule ordering . The device was an early target for criticism of the j rewrite-rule format on the grounds that it vastly increases the expressive power 3 of the model to the extent that any grammar the model generates is in all I likelihood In principle any two or more feature matrices or bound- ary symbols can be unified by means of the curly-bracket device. With this comes 1 the prediction that even if we restrict ourselves to combinations of two units as in rule 65 each combination has an equal chance of being instantiated in rules i characterizing processes in the world s languages. This is simply not correct. The J vast majority of the expressible conjunctions are not attested in any natural j language. And expanding the set of conjoined environments beyond two produces j an exponential increase in the number of expressible permutations again well nigh all of which correspond to nothing in the empirical record. j In contrast the specific combination illustrated in 64a is one that recurs with disturbing regularity in linear analyses of different languages and language j families although this fact remains no more than accidental within a theory J which incorporates brace notation. This reflects a more general failure to evaluate a very small class of attested processes any differently from a vast array of unattested types. j For some time now it has been recognized that the C I conjunction is an inadequate circumlocution referring to a single context that can only be satisfactorily characterized in terms of constituent Indeed it was partly in response to this observation that linear
