english sound structure part 13. 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. | 156 Licensing The nuclear position x2 in 7 autosegmentally licenses the melodic expression defining i. By virtue of being the head of its rhyme the same position prosodically licenses the coda position x3 on the rhyme And by virtue of being the head of its foot it licenses the nuclear position x5 on the foot projection. On the word projection x2 is itself licensed by x7 the nuclear head of the second foot. There thus exists a chain of licensing extending from the lowest to the highest level of phonological structure. From this it follows that only one unit within the phonological hierarchy may remain unlicensed. This is the ultimate head of a representation - the head of the highest-level domain in phonological structure which in this respect is thus equivalent to the root node of a matrix sentence in 1 Consideration of the representation in 7 reveals that directionality is one of the fundamental notions in terms of which licensing is defined. It also demonstrates that the direction of licensing varies according to the level of the prosodic hierarchy at which it operates. The other fundamental property of licensing is that it is subject to the condition of That is a licensor must be adjacent to its licensee. This observation is obviously true of a branching constituent in which the relation between the two positions is local on the skeletal tier. But the extension of this principle to all levels of the prosodic hierarchy is perhaps not so immediately obvious in view of the fact that one or more skeletal positions may intervene between a licensed position and its licensor. Turning again to 7 we may note for example that although the nuclear positions x2 and x5 enter into a licensing relation at the foot level they are separated by two other positions one a coda the other an onset . The key to understanding the uniformly local nature of licensing lies in the insight that adjacency is defined in terms of the particular level at .
