英语语音语调作业集团文件发布号：（9816-UATWW-MWUB-WUNN-INNUL-DQQTY-
1.For English phonemes, how many consonants are there? And how many vowels? What are pure vowels?
Speech sounds are generally divided into vowels and consonants.There are twenty-one letters of consonants and twenty-four consonant phonemes.Meanwhile,There are five letters of vowels and twenty vowels phonemes
A monophthong is a pure vowel sound, one whose articulation at both beginning and end is relatively fixed, and which does not glide up or down towards a new position of articulation.
2.How can people articulate sounds like /?/, /?/, /t?/, /d?/?
Is there any difference among them? What about /k/, /g/, and /?/?
Both /?/ and /?/ are fricatives.Fricatives are consonants produced by forcing air through a narrow channel made by placing two articulators close together.So they are sounds very short.But / T?/ and / D?/ belong to affricates.It means it is produced by first stopping the airflow entirely, then allowing air flow through a constricted channel at the place of articulation, causing turbulence.
/n/’s manner of articulation is occlusive, which means it is produced by obstructing airflow in the vocal tract. Because the
consonant is also nasal, the blocked airflow is redirected through the nose.
/g/’s manner of articulation is occlusive, which means it is produced by obstructing airflow in the vocal tract. Since the consonant is also oral, with no nasal outlet, the airflow is blocked entirely, and the consonant is a stop.
The different from /n/ and /?/ is that /?/ is a velar nasal,but /n/ is a alveolar nasal.Actually it’s position is same to
/g/.When you pronunce /?/ ,you have to be clear and forceful
3.please write down 8 words containing 8 different diphthongs.
1.House
2.dear,
3.play,
4.Grow
5.oil,
6.There
7.File
8.Great
[e] is a dorsal vowel and pure vowels.When you pronunce [e ],your tongue should be placed in the middle of the oral cavity.The tip of your tpngue should rest light against the back of yur loxer front teeth.
[ei] is a diphthong from [e] to [i],besides,it also is a long vowel.[ei] is read the letter A‘s pronunciation.The first element of the sound is the same as [e] and the only difference between the two is that in the pronunciation of [e],you have to stick to your tongue position throughout,while in the pronunciation of [ei],you have to change your tongue position to [i],making it a diphthong.。