Secondly, the distinction of the rhythmic structure of a word and a phrase is clearly observed in the cases when the word stress in notional words is omitted in a phrase, e.g.

I 'don't think he is 'right.

Or when the rhythmic structure of the isolated word does not coincide with that of a phrase, e.g.

'Fifteen. 'Room Fifteen. 'Fifteen 'pages.

So in a speech chain the phonetic structure of a word obtains additional characteristics connected with rhythm, melody, and tempo. Though the sentence stress falls on the syllable marked by the word stress it is not realized in the stressed syllable of an isolated word but in a word within speech continuum. Since the spheres of word stress and sentence stress fall apart their functions are actually different. Sentence stress organizes a sentence into a linguistic unit, helps to form its rhythmic and intonation pattern, performs its distinctive function on the level of a phrase.

2.1 Degrees of stress and rhythmical tendency

There are actually as many: degrees of stress in a word as there are syllables. A.C.Gimson, for example, shows the distribution of the degrees of stress in the word examination. The opinions of phoneticians differ as to how many degrees of stress are linguistically relevant in, a word. The British linguists usually distinguish three degrees of stress in the word. The primary stress is the strongest, it is marked by number 1 in the, word examination, the secondary stress is the second strongest marked by 2. All the other degrees are termed weak stress. Unstressed syllables are supposed to have weak stress. The American scholars В.Bloch and G.Trager find
four contrastive degrees of word stress, namely: loud, reduced loud, medial and weak stresses. Other American linguists also distinguish four degrees of word stress but term them: primary stress, secondary stress, tertiary stress and weak stress. The difference between the secondary and tertiary stresses is very subtle and: seems subjective. The criteria of their difference are very vague. The second pretonic syllables of such words as libe'ration, ,recog'nition are marked by secondary stress in RP, in General American they are said to have a tertiary stress. In GA a tertiary stress also affects the suffixes -оrу, -ary, -ony of nouns and the suffixes -ate, -ize, -y of verbs, which are considered unstressed in RP e.g. 'territory, 'cere,mony, 'dictio,nary, 'demonst,rate, 'orga,nize, 'simpli,fy. British linguists do not always deny the existence of tertiary stress as a tendency to use a tertiary stress On a post-tonic syllable in RP is also traced. However, the British conception of three degrees of word stress is accepted as the teaching norm.

We would like to point out right here that the accentual structure of English words is liable to instability due to the different origin of several layers in the Modern English wordstock. In Germanic languages the word stress originally fell on the initial syllable or the second syllable, the root syllable in the English words with prefixes. This tendency was called recessive. Most English words of Anglo-Saxon origin as well as the French borrowings (dated back to the 15th century) arе subjected to this recessive tendency. Unrestricted recessive tendency is observed in the native English Words having no prefix, e.g. mother, daughter, brother, swallow, in assimilated French borrowings, e.g. reason, colour, restaurant. Restricted recessive tendency marks English words with prefixes, e,g, foresee, begin, withdraw, apart. A great number of words of Anglo-Saxon origin are moresyllabic or disyllabic, both notional words and form words. They tend to alternate in the flow of speech, e.g. I 'don't be'lieve he's, 'right.

The rhythm of alternating stressed and unstressed syllables gave birth to the rhythmical tendency in the present-day English which caused the appearance of the secondary stress in the multi-syllabic French borrowings, e.g. ,revolution, ,organi'sation, as,si-mi'lation, etc. It also explains the placement of primary stress on the third syllable from the end in three- and four-syllable words, e.g. 'cinema, 'situate, er'ticulate. The interrelation of both the recessive and the rhythmical tendencies is traced in the process of accentual assimilation of the French-borrowed word personal on the diachronic level, e;g; perso'nal -- perso'nal -- personal.

The appearance of the stress on the first syllable is the result of the recessive tendency and at the same time adaptation to the rhythmical tendency. The recessive tendency being stronger, the trisyllabic words like personal gained the only stress on the third syllable from the end, e.g. 'family, 'library, 'faculty, 'possible.

The accentual patterns of the words 'territory, 'dictionary, 'neces,sary in GA with the primary stress on the first syllable and the tertiary stress on the third are other examples illustrating the correlation of the recessive and rhythmical tendencies. Nowadays we witness a great number of variations in the accentual structure of English multisyllabic words as a result of the interrelation of the tendencies. The stress on the initial syllable is caused by the diachronical recessive tendency or the stress on the second syllable under the influence of the strong rhythmical tendency of the present day, e.g. 'hospitable-- ho'spitable, 'distribute -- dis'trihute, 'aristocrat -- a'ristocrat, 'laryngoscope -- la'ryngoscope.

A third tendency was traced in the instability of the accentual structure of English word stress, the retentive tendency: a derivative often retains the stress of the original or parent word, e.g. 'similar -- as'similate, secom'mend - recomme'ndation.

2.2 Functional aspects of word stress

In discussing accentual structure of English words we should turn now to the functional aspect of word stress. Word stress in a language performs three functions. I. Word stress constitutes a word, it organizes the syllables of a word into a language unit having a definite accentual structure, that is a pattern of relationship among the syllables; a word does not exist without the word stress. Thus the word stress performs the constitutive function. Sound continuum becomes a phrase when it is divided into units organized by word stress into words. П. Word stress enables a person to identify a succession of syllables as a definite accentual pattern of a word. This function of word stress is known as identificatory (or recognitive). Correct accentuation helps the listener to make the process of communi-.cation easier, whereas the distorted accentual pattern of words, misplaced word stresses prevent normal understanding.

Ш. Word stress alone is capable of differentiating the meaning of words or their forms, thus performing its distinctive function. The accentual patterns of words or the degrees of word stress and their positions form oppositions, e.g. 'import -- im'port.

VA.Vassilyev introduces the term "accenteme" for Word stress as a suprasegmental phonological unit having different degrees and placement in a word (79). For instance the primary accenteme is opposed to the weak word accenteme (unstressed position), in 'import -, im'port differentiating the noun from the verb. A.C.Gimson establishes three groups of words with identical spelling representing different parts of speech which are opposed by means of shifting of the stress

1. A small group of words where the noun is differentiated from a verb by the opposition of the accentual pattern of the word alone, e.g.

increase [`inkri:s] - [in'kri:s]

impress [`impres] - [im'pres]

inlay [`inlei] - [in'lei]

2: The second group where the shifting of the stress which

means the change of the accentual pattern of the word may be or may not be accompanied by the reduction of the vowel in the unstressed vowel, e.g.

transport [`trжnspo:t] - [trжns'pot] or [tr?ns'pot]

3. The largest group of such pairs of words manifests the change of their accentual pattern together with the qualitative reduction of the unstressed vowel, e.g.

combine [ `kombain] - [k?m'bain]

contrast [`kontra:st] - [k?n'tra:st]

and many others.

Oppositions of accentual types of words are also observed as a concomitant factor in word-formation in addition to suffixation.

[`_ _ _] - [,_ _ `_] e.g. `organize - ,organi'zation

[`_'_ _ _] - [`_,_ _ `_ _] e.g. `predis'pose - `pre,dispo'sition

[`_ _ _] - [`_ _ _ `_] e.g. `solemn - `solemni'zation

[,_ _ `_] - [`_ _ ,_ _'_ _] e.g. ,incon'siderable - `incon,side'ration.

There is also a group of accentuation oppositions where compound nouns are opposed to free word combinations, e.g.

a `dancing-girl - танцовщица

a `dancing `girl - танцующая девушка

As we have already mentioned the same distinctive function of word stress is observed in the Russian language, It differentiates words and their grammatical forms, e.g.

The words чэдная - чуднбя, безобрбзная - безубразная are different lexical units, they differ in meaning. ,

The words зимы - зимы, беды-- беды represent different, grammatical forms of the same lexical unit. Both in word-building and in word-formation the shifting of stress is accompanied by the qualitative reduction of the unstressed syllable. Word-formation with the help of the shifting of stress is quite common in
Russian as well as in English.

The accentual structure of words is actually very closely interrelated with their semantic value. By way of illustration we shall now analyse a fairly large class of words in English which are marked by two primary stresses (Accentual Type П). They are either compounds consisting of two semantically important,
stems or words with semantically relevant separable prefixes or the suffix -teen. The accentual pattern of this group of words is regulated by the meaningful weight of the elements of the compounds. Word stress establishes contrastive relationship of the elements and often creates opposition to comparable words.

Most of compound adjectives have two equal stresses as both elements in them are semantically important, e.g. 'absent-'minded, 'good-looking. ...

As soon as the significance of one of the elements of a compound adjective is weakened, its accentual pattern is changed. (Accentual Type I), e.g. 'spring-like, 'nymph-like, 'powder-like; 'oval-shaped,'bow-shaped.

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