The adjective. Types of adj. Degrees of comparison

The sound alternation (replacive morpheme) a way of expressing grammatical category by changing a sound inside the root. Suppletive formation is building a form of a word by different stems: good-better/go-went
On the basis of linear characteristics, “continuous (linear)” morphemes and “discontinuous” morphemes are distinguished.
The discontinuous morpheme is a 2-element grammatical unit, which is the analytical from comprising an auxiliary word and a grammatical suffix:

• 
  e.g. be … ing – is going (continuous)
  
• 
  have … en – has gone (perfect)
  
• 
  be … en – is taken (passive)
  

Continuous morpheme is uninterruptedly expressed.
19. the infinitive
The infinitive is the base form of the verb plus the particle "to": to play, to see, to walk. Bare infinitive (i.e., infinitive without the particle "to") is used after modal verbs and after several other verbs(make, let). The infinitive has several forms: simple / active (to read), passive (to be read), continuous (to be reading), perfect (to have read), perfect continuous (to have been reading). Simple / active and passive infinitive forms are the most common. An infinitive can function as the subject, part of the predicate, object, attribute, adverbial modifier.
In languages that have infinitives, they generally have most of the following properties:

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  In most uses, infinitives are non-finite verbs.
  
• 
  They function as other lexical categories — usually nouns — within the clauses that contain them, for example by serving as the subject of another verb.
  
• 
  They do not represent any of the verb's arguments.
  
• 
  They are not inflected to agree with any subject.
  
• 
  They cannot serve as the only verb of a declarative sentence.
  
• 
  They do not have tense, aspect, moods, and/or voice, or they are limited in the range of tenses, aspects, moods, and/or voices that they can use. (In languages where infinitives do not have moods at all, they are usually treated as being their own non-finite mood.)
  

In Modern English we distinguish the following predicative constructions with the infinitive:

1. 
   The Objective-with-the-Infinitive Construction
   
2. 
   The Subjective-with-the-Infinitive Construction
   
3. 
   The For-to-Infinitive Construction
   
4. 
   The Absolute Infinitive.