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  • The T and D consonant sounds. These two sounds are paired together because they take the

  • same mouth position. Tt is unvoiced, meaning, only air passes through the mouth. And dd

  • is voiced, meaning, uh, uh, dd, you make a noise with the vocal cords. These consonants

  • are stop consonants, which means there are two parts. First, a stop of the airflow, and

  • second, a release. The airflow is stopped by the tongue position. The tongue will come

  • up and the front part will touch the roof of the mouth just behind the top teeth. It

  • will then pull down to release the air. The teeth are together, tt, and as the air comes

  • out, when the tongue releases, they part, tt, dd. Let's take for example the word 'pat'.

  • Pat: the first part, the tongue has moved up into position, cutting off the flow of

  • air. Pa-tt. And the second part, the tongue releases, and the air comes through the closed

  • teeth. A note about the teeth position for the D. As I said, the teeth are together,

  • tt, and part when the air is released. This must happen for a release of the T. But the

  • D can actually be made without the teeth coming all the way together: dad, dad. You can see

  • there the teeth are not closing all the way, but you're getting a D sound by the tongue

  • coming up into position and pulling away. Stop consonants are sometimes pronounced without

  • the second part, without this release, when they come at the end of a syllable or a word.

  • Let's take for example the sentence 'I bet you did'. I bet, you can see the tongue has

  • moved up into position for the T. I bet you did. But rather than releasing air through

  • the teeth, the mouth simply moves into the next sound, which is the 'ew' as in 'few'

  • diphthong. I bet you did. I bet you did. No release. It's important to note we're not

  • just leaving out the sound. I bet -- the tongue is moving into position, which is cutting

  • off the airflow. And that stop is part of the T. I bet you did. So even though we're

  • not releasing to give the complete full T, the idea is still there by the tongue going

  • into position, cutting off the airflow. So T and D can sometimes be pronounced with the

  • stop and the release, and sometimes just the stop. The T has another pronunciation, it's

  • call the flap or tap T, and on my website in the International Phonetic Alphabet, I

  • use the D symbol to represent this sound because it sounds and functions, and is made just

  • like the D. This sound happens when the T comes between two vowel sounds. Let's take

  • for example, the word madder and matter. One is spelled with two D's, and one with two

  • T's. But they're pronounced the same: madder, matter. Let's look at them in sentences. I'm

  • madder than I've ever been. What's the matter? It's the same sound. The lip position of these

  • sounds is influenced by the sound that comes next. For example, dime, dime. You can see

  • the mouth is taking the shape of the first sound of the 'ai' as in 'buy' diphthong, dime,

  • even before the D is made. Drain, drain. Again, you can see the lips taking the position for

  • the R, drain, even before the D is made. Do, do, again you can see the lips taking the

  • circle for the 'oo' as in 'boo' vowel. Do, do. Here we see the T/D mouth position on

  • the right compared with the mouth at rest on the left. Here, parts of the mouth are

  • drawn in. The soft palate is raised for these consonant sounds. The tongue position stretches

  • up in the front and presses against the roof of the mouth to make the stop before releasing

  • the air. The position is just behind the top front teeth. Sample words: time/dime, tad/dad,

  • tote/dote. The last two word pairs ended with T's and D's. Did you notice that I did not

  • release them? Sample sentence: Tom tasted Dad's dark chocolate treats. Now you will

  • see this sentence up close and in slow motion, both straight on and from an angle, so you

  • can really study how the mouth moves making these sounds. Tom, with the T, you see the

  • teeth close, the tongue raised behind them. And there's the release. Tom. The lips will

  • close for the M, and when they open you will see the teeth are still closed for the T in

  • tasted. Then the ST consonant cluster, and there there's a quick ih vowel, there, before

  • the D, tasted. Dad's. The tongue will come up here to make the D, there will be a quick

  • Z before the D in dark, and you can see the lips already starting to take the form of

  • the R even before the teeth release. Chocolate, tongue through the teeth for the L, and then

  • up to make the T which is a stop here. Treats, and again you see the lips forming the R even

  • before the teeth release the T. And the TS sound at the end. Tom, you see the tongue

  • tip up behind the closed teeth, releasing into the 'ah' as in 'father'. Lips close for

  • the M. Tasted, tongue up to make the T, quick ih sound and then the D, tasted, Dad's. Tongue

  • up again to make the final D. Dad's. Dark, lips taking the form of the R. Chocolate,

  • tongue up for the L and then to the roof of the mouth to make the stop of the T. And treats,

  • where the lips form the R shape around the closed teeth. And tongue tip up to make the

  • final T, and S sound. Treats. That's it, and thanks so much for using Rachel's English.

The T and D consonant sounds. These two sounds are paired together because they take the

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英語。如何發音T和D輔音。美國口音 (English: How to Pronounce T and D consonants: American Accent)

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    Sam 發佈於 2021 年 01 月 14 日
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