元音的分类

Four criterias:
• The height of tongue raising • The position of the highest part of the tongue • The length or tenseness of the vowels • Lip-rounding
Байду номын сангаас
The clock has stopped. Pride goes before a fall. Choose either boots or shoes. He looks like a good cook.
• Monophthongs 单元音 • Diphthongs 双元音 iə eə uə…… • Triphthongs 三元音 {eiə} （player）……
The length/ tenseness of the vowel (long/ tense, short/ lax)
• Long vowels: {i:} {ɜː} {a:} {ɔ:} {u:} ɜ • Short vowels: {e} {i} {u} {ʌ} {ɔ} {ə} {æ} ʌ ɔ
The height of tongue raising（high, mid, low) （
The position of the highest part of the tongue (front , central, back)
• A friend in need is a friend in deed. • A fat cat is catching a fat rat. • The nurse put her pearls in her purse. • A good cook stood in a wood to have a look at a good book.
Lip-rounding (rounded, unrounded)
• Rounded vowel: {u} {u:} {ɔ} {ɔ:} ɔ • Unrounded vowel: {i:} {ə:} {a:} {e} {i} {ʌ} {ə} {æ} ʌ
• [ɔ] • [ɔ:] • [u:] • [u]
• No pains no gains . • As you sow you shall mow . • Strike while the iron is hot . • Round and round the house went the crowd . • The spoilt boy destroyed the toys . • She is really dearer than a dear . • There, that’s the square where the fair will be held . • The jury were sure the poor man was innocent of stealing the jewels.