Place Tongue Between Teeth To Pronounce TH Sound

To correctly produce the “th” sound in English, place the tip of your tongue lightly between your upper and lower front teeth, then push air outward. For the voiceless sound, let the air flow silently over your tongue; for the voiced sound, vibrate your vocal cords while maintaining that exact same tongue position. Avoid pulling your tongue back behind your teeth, as this will change the sound to a harsh “t” or “d”.

Understanding the Voiceless and Voiced TH Sounds

The English language uses the same physical mouth position for the “th” sound, but changes whether your vocal cords vibrate. This creates two distinct phonetic sounds:

• The Voiceless TH (/θ/): Your vocal cords do not vibrate. It is a quiet, breathy sound. You use this sound at the beginning of words like “think”, “thing”, and “bath”.
• The Voiced TH (/ð/): Your vocal cords vibrate, creating a buzzing sensation against your tongue. You use this sound in words like “this”, “that”, “mother”, and “the”.

Step-by-Step Guide to the Correct Mouth Position

Mastering how to pronounce the th sound requires training your mouth muscles to hold an unfamiliar position. Follow these steps in front of a mirror to check your form:

1. Relax your jaw: Open your mouth slightly. Do not clench your teeth.
2. Extend your tongue: Stick the tip of your tongue out just a fraction of an inch.
3. Position the tip: Place the very tip of your tongue lightly between your upper and lower front teeth.
4. Press gently: Let your teeth rest gently on the sides of your tongue, but do not bite down hard.
5. Release the air: Blow air out steadily over your tongue. If you are practicing the voiced version, turn your voice on while blowing.

Common Mistakes and How to Fix Them

Many English learners struggle with this sound because it does not exist in their native language. Here are the most frequent errors and how to correct them:

• Substituting “T” or “D”: If you pull your tongue back behind your top teeth, you will accidentally say “tink” instead of “think”. Keep the tip of your tongue visible between your teeth.
• Substituting “S” or “Z”: If you tuck your tongue behind your teeth and push air through a narrow gap, you get an “s” sound. Ensure the tip of the tongue breaks the plane of your teeth.
• Biting too hard: Pressing your tongue too firmly will block the airflow and cause discomfort. The tongue should glide lightly against the teeth.

Daily Practice Words and Sentences

Consistent repetition is the best way to build muscle memory. Practice saying the following words slowly, exaggerating the tongue placement, then gradually speed up.