Turan international university

What are the principles of vowel classification?

1. 
   According to the horizontal movement of the tongue; according to the vertical movement of the tongue; According to the position of the lips; According to the stability of articulation; According to the length.
   
2. 
   According to the place of articulation; According to the position of the soft palate; According to the horizontal movement of the tongue.
   
3. 
   According to the place of articulation; According to the manner of articulation; According to the horizontal movement of the tongue; According to the vertical movement of the tongue.
   
4. 
   According to the position of the soft palate; According to the horizontal movement of the tongue; According to the vertical movement of the tongue; According to the position of the lips.
   

12. 
    What types of assimilation do you know?
    

1. 
   Historical and living; progressive and regressive; complete and partial.
   
2. 
   Special and descriptive; progressive and regressive; comparative and universal.
   
3. 
   Historical and living; special and descriptive; comparative and universal
   
4. 
   Historic and synchronic.
   

12. 
    What is the classification of vowels according to the length?
    

1. 
   Long, short.
   
2. 
   Very long, long, short.
   
3. 
   Very long, very short.
   
4. 
   Long, very long, short, very short.
   

12. 
    What is the classification of vowels according to the stability of articulation?
    

1. 
   monophthongs and diphthongs
   
2. 
   monophthongs, diphthongs, triphthongs
   
3. 
   long vowels, open vowel, diphthongs
   
4. 
   short vowels, close vowels, monophthongs
   

12.