How many tones are there in English letters?

Eight vowel phonemes and pronunciation rules vowel/α:/,/? /、/? :/、/u/、/u:/、/∧/、/？ /、/? :/

Examples of 20 vowels corresponding to vowels

1) [I:] Sea, he, look, film, ceiling

2) [I] sit, build, miss, myth

3) Bed, desk, head,

4) [AE] Bad products, land, banks and stamps (A and E are connected)

Car, fast, class, plants, calm, aunt

6) [ ? ] business English hot, want.

7) [ ? Door, more, sports, ball, warmth, author, court, purchased, captured.

8) [u:] OK, Wei, Lan, Tang,

9) Look, let go, woman, yes.

10) [ ? 】 Cup, come, blood, rough

1 1) [ ? Girls, jobs, services, nurses

12) [? Cadres, before, forget, courtesy, dollars, doctors, famous, Saturday.

13) [ei] cakes, they, play, eight, great,

14) [AI] Bike, death, neither, light, trying, finding, height, eyes.

15) [? Telephone, cold, boat, soul, growth

Houses in the town

17) [? Boy, oil

18) [me? Dear, idea, deer, here, fierce,

19) [] pear, care, there, fair

20）【u？ 】 tourism, poverty,