Theoretical grammar пәні бойынша

Not all the 3 principles work at the same time. There are, for example, unchangeable words.
By meaning we do not understand the individual meaning of a word (its lexical meaning) but the meaning common to all the words of a given class.
By form we mean the morphological characteristics of a type of word. Verbs are characterized by the categories of tense, mood, aspect, voice, etc. The form is not just stem-building elements.
By function we mean the syntactical properties of a type of words, i.e. its distribution (combinability and arrangement in a sentence) and its function in a sentence.
Problem classes of words:

• 
  response words 
  1. meaning – response statement 
  2. negative combinability 
  3. functioning as sentence-words (Are you coming? – Yes.)
  
• 
  modal words 
  1. meaning – modality: certainty, probability, i.e. speaker’s evaluation 
  2. form – invariable 
  3. function – do not enter any phrases, stay outside Happily they arrived. They arrived happily.
  
• 
  statives 
  1. meaning – state 
  2. form – prefix a-, no degrees of comparison 
  3. function of a predicative (He is afraid of difficulties)
  
• 
  postpositions (to bring up :: to bring)
  
• 
  particles (He is simply mad. He speaks simply.)
  
• 
  word-substitutes (Prof.Vorontsova: He speaks English better than I do).
  

Field theory. Prof.Admoni: there are linguistic units in every part of speech which possess all the properties of the given class. This is the nucleus of this part of speech. But there are also units which possess not all the properties of it though they belong to this part of speech. The field then includes both the central part and periphery, it is not homogeneous. The task of the linguist is to reveal all the central and all the peripheral elements.