Theoretical grammar пәні бойынша

18. Word-Formation
A derivational base unlike a stem does not predict’ the part of speech of the derivative, it only outlines a possible range and nature of the second IC and it is only the unity of both that determines the lexical-grammatical class of the derivative.
Derivational affixes are ICs of numerous derivatives in all parts of speech.
A derivational pattern is a regular meaningful arrangement. Patterns of derivative structures are usually represented in a generalised way as conventional symbols: small letters v, n, a, d, пит stand for the stems of the respective parts of speech: verbs, nouns, adjectives, adverbs, numerals. In words of the long-fingered or sit-inner type the derivational bases are represented by bracketed symbols of the parts of speech making up the corresponding collocations, for example (a+n)+ +-ed), (v+d) + er.
According to their derivational structure words fall into two large classes: simple, non-derived words or simplexes and derivatives or complexes. Complexes are classified according to the type of the underlying derivational pattern into: derived and compound words. Derived words fall into affixational words, which in their turn must be classified into suffixal and prefixal derivatives, and conversions.
1. There are two levels of approach to the study of word-structure: the level of morphemic analysis and the level of derivational or word-formation analysis.

2. 
   The basic unit of the morphemic level is the morpheme defined as the smallest indivisible two-facet language unit.
   
3. 
   Three types of morphemic segmentability of words are distinguished in linguistic literature: complete, conditional and defective. Words of conditional and defective segmentability are made up of full morphemes and pseudo (quasi) morphemes. The latter do not rise to the status of full morphemes either for semantic reasons or because of their unique distribution.
   
4. 
   Semantically morphemes fall into root-morphemes and affixational morphemes (prefixes and suffixes); structurally into free, bound and semi-free (semi-bound) morphemes.
   
5. 
   The structural types of words at the morphemic level are described in terms of the number and type of their ICs as monomorphic and polymorphic words.
   
6. 
   Derivational level of analysis aims at finding out the derivative types of words, the interrelation between them and at finding out how different types of derivatives are constructed.
   
7. 
   Derivationally all words form two structural classes: simplexes, i.e. simple, non-derived words and complexes, or derivatives. Derivatives fall into: suffixal derivatives, prefixal derivatives, conversions and compounds. The relative importance of each structural type is conditioned by its frequency value in actual speech and its importance in the existing word-stock.
   

Each structural type of complexes shows preference for one or another part of speech. Within each part of speech derivative structures are characterised by a set of derivational patterns.

8. 
   The basic elementary units of the derivative structure are: derivational bases, derivational affixes, derivational patterns.
   

Derivational bases differ from stems both structurally and semantically. Derivational bases are built on the following language units: a) stems of various structure, b) word-forms, c) word-groups or phrases.