Classification of vowel in modern English

Vowels are voiced sounds in forming which the airstream passes freely without any obstruction through the larynx the mouth cavity make the vocal cords vibrate. Vowels are classified:

in the stability of articulation: (1.l) monothongs – are vowels the articulation of which doesn’t change. The quality of such v-ls is relatively pare [i,e,a:, o:,);, u,3:, ?] ;(1.2) diphthongs in the pronunciation of diphthongs the organs of  speech slide from one v-l position to another within one  syllable. The nuclear of diphthongs is strong distinct the glide is very weak [ei, эi, au, ?u, є?, u?]. (1.3) In the pronunciation of diphthongs the articulation changes just a little bit.

But the difference between the nuclear the end is not so distinct as it is in the case of diphthongs; [i:, u:].  The tongue position: horizontal movement of the tongue.  When the tongue is in the front part of the mouth and the  front part of it is raised up to the hard palate a front v-1 is pronounced [i:, e].

When the front of the tongue is raised  towards to the back part of the lard palate the vowel is called
central (or mixed) [?:, ?]. When the tongue is in the back part of the mouth and raised up to the soft palate a back  vowel is pronounced [a:, э, э:, u:]. Vertical movement high (or closed) vowels: [i:, u, u:], open (low) vowels [a:, o;].  The lip position. When the lips are neutral or spread the vowels are called unrounded.

When the lips more or less  round they called rounded [u;, u]. The character of vowel end. If a stressed v-l is followed by a strong voiceless consonant it is cut off by it. In this case the  end of the vowel is strong and the vowel is called checked. If  a v-1 is followed by a weak voiced consonant or by no  consonant at all, the end of it is very weak. In this case the  vowel is called free.  Vowel length. All Eng. Monophthongs are   divided into  long[I:, a: u:,?:] and short[I e u a].

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Значение повести алые паруса александр грин.
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