Compound vowels: ai, ei, ui, ao, ou, iu, ie, ue, er.
Pronasal vowels: an, en, in, un, ü n.
After nasal vowels: ang, eng, ing, ong.
A compound vowel is a vowel composed of two or three vowels, which is called a compound vowel. The compound vowel of compound vowel is not a combination of two or three vowels, which can be regarded as a distribution and recombination.
Because two or three vowels will get a new fixed sound group after recombination, and this sound group can drive the mouth, tongue and ears at the same time, all of which have the same feeling as the unit rhyme, rather than the simple addition we simply understand.
18 Pronunciation method of polyphonic vowels:
1, ai (Ai): When pronouncing, pronounce the sound of A first, and then slide to I, with uninterrupted airflow and short pronunciation.
2. ei (er): pronounce the sound of e first, then slide to I, the airflow will not be interrupted, and the corners of the mouth will spread to both sides.
3.ui (Wei): The pronunciation of U is light and short, and then it slides to ei, and the mouth shape changes from round to flat.
4.ao (concave): when pronouncing, pronounce a first, then the tip of the tongue retracts, the base of the tongue is lifted up, the mouth gathers in a circle, and gently slides to O.
5. ou (ou): When pronouncing, the O sound is pronounced first, the lips gradually gather, the base of the tongue is raised, and the mouth shape changes from big circle to small circle.
6, iu (excellent): pronounce I first, then slide to ou, and the mouth shape changes from flat to round.
7.ie (also): when pronouncing, I is pronounced first, then E, and the airflow is not interrupted.
8. e (abuse): pronounce first, then slide to e, and the mouth becomes flat from round.
9.er (ear): when pronounced, the tongue is in the middle of the e sound, and then the tip of the tongue is rolled up to the hard palate, and the two letters are pronounced at the same time.
10, An (an): Pronunciation starts with a, then the tip of the tongue is gradually raised and pressed against the upper gum to pronounce the vowels an, ian, uan and üan.
1 1, En (en): When pronouncing, e is pronounced first, then the tongue surface is lifted, the tip of the tongue is pressed against the upper gum, and the air flow is exhausted from the nasal cavity, making n sounds. Pronunciation of nasal vowels en, uen, in and ü n.
12, in (sound): When pronouncing, I is pronounced first, and then the tip of the tongue is pressed against the back of the lower incisor, and the tongue surface gradually reaches the hard palate, and the airflow is released from the nasal cavity, making an N sound.
13, un (temperature): When pronouncing, first pronounce the U sound, then press the tip of the tongue on the upper gum, then pronounce the N sound, and the airflow will be released from the nasal cavity.
14, ≤ n (halo): When pronouncing, pronounce ≤ first, then lift your tongue and press it on the upper gum, and the airflow leaks from the nasal cavity, making an N sound.
15, ang (Hangzhou): Pronunciation starts with A sound, then the base of the tongue presses on the upper soft palate, air flows out of the nasal cavity, and then the ng sound at the end of the nasal sound is pronounced.
16, eng (uh-huh): When pronouncing, first pronounce the E sound, then press the gum with the tip of the tongue, and the root of the tongue retracts against the soft palate to pronounce the ng sound, and the airflow is exhausted from the nasal cavity.
17, ing (eagle): When pronouncing, the tip of the tongue touches the gums, the tongue bulges towards the hard palate, and the nasal cavity sounds * * *.
18, Weng (Weng): When pronouncing, first pronounce O, then the base of the tongue retracts against the soft palate, the tongue surface is convex, the lips are round, and the nasal cavity is * * *.