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Functional Sentence Perspective
d o with it. We are not going to analyse the lexical meanings of individual words, which are treated in lexicology, but the function of a word or word group within a sentence expressing a certain thought; their function, that is, in expressing either what is already assumed or what is new in the sentence uttered.
We would rather avoid all terms built on the principle of combining the already existing terms "subject" and "predicate"
with some limiting epithets, and use a pair of terms which have not yet been used to express any other kind of notion.
The pair of terms best suited for this purpose would seem to be "theme" and "rheme", which came into use lately, particularly in the works of several Czech linguists, who have specially studied the problem, notably with reference to the English language, both from the modern and from the historic viewpoint. Among the Czech scholars who have widely used these terms we should first of all mention Jan Firbas, who has developed a theory of his own on the historical development of the English language in this sphere.
1
The terms "theme" and "rheme"
are both derived from Greek, and are parallel to each other. The term "theme" comes from the Greek root
the- 'to set', or 'establish', and means 'that which is set or established'. The term "rheme" is derived from the root
rhe -'to say', or 'tell', and means 'that which is said or told' (about that which was set or established beforehand). These terms are also convenient because adjectives are easily derived from them: "thematic" and "rhematic", respectively.
What, then, are the grammatical means in Modern English which can be used to characterise a word or word group as thematic, or as rhematic? We should note in passing, however, that it will hardly be possible to completely isolate the grammatical from the lexical means, and we shall have to discuss some phenomena which belong to
lexicology rather than grammar, pointing out in each case that we are doing so.
The means of expressing a thematic or a rhematic quality of a word or phrase in a sentence to a great extent depend on the grammatical structure of the given language and must differ considerably, according to that structure.
Thus, in a language with a widely developed morphological system and free word order, word Order can be extensively used to show the difference between theme and rheme. For instance, word order plays an important part from this viewpoint in Russian. Without going into particulars, we may merely point out the difference between two such sentences as Старик вошел and Вошел
1 See J. Firbas,
Some Thoughts on the Function of Word-Order in Old English and Modern English. Sbornik prací filosofické fakulty brnenské university, 1959,