Originally published 10 March 2016 as a short Punggol pronunciation lesson. Rebuilt in 2026 as a phonology and oral-communication guide. Old sales, contact and image clutter have been retired.
Quick answer: the, three and tree begin with different English sounds. The normally begins with the voiced dental fricative /ð/; three begins with the voiceless dental fricative /θ/; tree begins with /t/. The difference comes from tongue placement, airflow and voicing—not from “speaking more carefully” in a vague way.
The reader-purpose of this guide is to help learners hear the contrast, produce it deliberately, use it in words and sentences, and transfer it into natural speech without treating accent difference as a defect in identity.
Three sounds, three mechanisms
| Word | Initial sound | What the mouth does |
|---|---|---|
| the | /ð/ | Tongue lightly at or between the teeth, air continues, voice is on |
| three | /θ/ | Tongue lightly at or between the teeth, air continues, voice is off |
| tree | /t/ | Tongue closes airflow near the ridge behind the upper teeth, then releases |
1. /θ/ — the sound at the start of “three”
The sound /θ/ is a voiceless dental fricative. “Dental” means the tongue works at the teeth. “Fricative” means the sound is made by continuous friction as air passes through a narrow opening. “Voiceless” means the vocal folds are not vibrating.
- Place the tip of the tongue lightly between or against the upper and lower front teeth.
- Do not bite the tongue hard.
- Let air escape continuously.
- Keep the throat relaxed and unvoiced.
- Move directly into the following vowel: th-ree.
Useful words: think, thin, three, thank, Thursday, both, teeth, bath.
2. /ð/ — the sound at the start of “the”
The sound /ð/ is also a dental fricative, but it is voiced. The tongue and airflow are similar to /θ/, while the vocal folds vibrate.
- Use the same light tongue position near the teeth.
- Let air continue through the narrow opening.
- Turn the voice on.
- Place two fingers lightly on the throat: vibration should be easier to feel than for /θ/.
Useful words: the, this, that, these, those, then, mother, brother, breathe.
3. /t/ — the sound at the start of “tree”
The sound /t/ is a stop consonant. The tongue blocks the airflow briefly and then releases it. In English, the tongue normally contacts the alveolar ridge—the raised area just behind the upper front teeth—rather than protruding between the teeth.
For tree, the /t/ is followed quickly by /r/. The tongue therefore moves from a stop into the /r/ configuration.
Why learners sometimes merge “three” and “tree”
Languages organise speech sounds differently. If a learner’s first language or habitual variety of English does not use /θ/ as a strong contrast, the sound may be replaced by a nearby category such as /t/, /f/, /s/ or another familiar consonant.
This is not laziness. The brain is categorising an unfamiliar sound using the sound inventory it already has.
The teaching job is therefore to create a new contrast:
hear the difference → feel the mouth difference → produce it slowly → stabilise it in words → transfer it into connected speech.
Why /ð/ may sound like /d/
The sounds /ð/ and /d/ are both voiced, so they share one feature. But /d/ is a stop: airflow is blocked. /ð/ is a fricative: airflow continues.
Compare:
- den /d/ — brief closure and release;
- then /ð/ — continuous friction at the teeth.
If “the” consistently begins with a hard /d/, ask the learner to hold the first sound. /ð/ can be sustained briefly; /d/ cannot be sustained in the same way without becoming another sound.
Listening comes before reliable production
A learner who cannot hear the contrast consistently will find it harder to monitor their own speech.
Start with discrimination:
- three / tree;
- thin / tin;
- thought / taught;
- thank / tank;
- then / den;
- they / day;
- those / doze.
Say or play one word at a time and ask the learner to identify which sound occurred. Accuracy in listening should improve before speed is increased.
Minimal pairs reveal the contrast
A minimal pair contains words that differ in one important sound. These pairs help learners notice that changing one consonant can change meaning.
| /θ/ word | Contrast |
|---|---|
| thin | tin |
| three | tree |
| thank | tank |
| thought | taught |
Perfect minimal pairs are not available for every sound combination, but the training principle remains useful: isolate one contrast so the learner can attend to it.
The mirror test
A mirror can provide immediate visual feedback. For /θ/ and /ð/, a small part of the tongue may be visible near the teeth. For /t/, the tongue normally stays behind the teeth.
- Say three slowly and watch the tongue.
- Say tree slowly and compare.
- Repeat until the physical contrast feels deliberate.
The tissue test for airflow
Hold a small piece of tissue in front of the mouth. For /θ/ and /ð/, air continues through the fricative. For /t/, the airflow pattern is more stop-and-release.
This is not a formal acoustic measurement. It is a simple teaching cue to help learners feel that the sounds are produced differently.
The throat test for voicing
Place two fingers gently on the throat.
- Hold /θ/: little or no voicing vibration.
- Hold /ð/: vibration should be noticeable.
This helps separate three from the, because both use a dental fricative position but differ in voicing.
“The” has more than one common pronunciation
The article the commonly appears as /ðə/ before a consonant sound and /ðiː/ before a vowel sound or when specially emphasised.
- the book — commonly /ðə/;
- the apple — commonly /ðiː/;
- the one I meant — /ðiː/ may be used for emphasis.
Natural speech varies, and speakers do not always follow a perfectly mechanical rule. The central pronunciation target is the initial /ð/ contrast and intelligibility.
Word practice is not enough
A learner may pronounce three perfectly when staring at a word card and still revert to tree during spontaneous conversation. This is a transfer problem.
Practice should progress through levels:
- sound alone;
- syllable;
- single word;
- short phrase;
- prepared sentence;
- read-aloud passage;
- spontaneous answer;
- conversation under ordinary speaking speed.
Sentence practice
- The three trees are near the gate.
- Those three students thanked their teacher.
- I think the tree is taller than this one.
- The third group will present on Thursday.
These deliberately place /θ/, /ð/ and /t/ close together so the learner must maintain the contrast rather than produce one isolated word.
Slow practice should become natural speech
Exaggerated tongue placement can be useful during training, but the final goal is not exaggerated speech. Once the learner can control the sound, reduce the movement to a natural, efficient articulation.
A pronunciation drill has succeeded when the learner no longer needs to think consciously about every tongue movement.
Pronunciation and PSLE oral communication
The current 2026 PSLE English syllabus includes clear and accurate pronunciation within Oral Communication, together with fluency, expression, grammatical accuracy and appropriate vocabulary. Pronunciation is therefore one part of effective communication, not the whole oral examination.
A child who spends so much attention on one sound that ideas stop flowing has not reached the final goal. Precision should support communication.
Accent respect: intelligibility before imitation
Singapore contains many legitimate English accents, and international English is spoken with enormous variation. Teaching pronunciation should not become a demand that every learner imitate one prestige accent.
Target a sound when:
- it repeatedly changes meaning;
- listeners often misunderstand the learner;
- the learner wants greater control for formal speaking;
- the distinction is relevant to an assessment;
- the student cannot hear a contrast they need to produce.
Common teaching mistakes
- saying “speak properly” without showing the physical mechanism;
- correcting accent features that do not reduce intelligibility;
- drilling production before checking listening discrimination;
- practising only isolated words;
- forcing speed before the contrast is stable;
- embarrassing a child publicly for a pronunciation difference;
- treating one successful repetition as permanent learning.
A five-minute practice routine
- Hear: identify /θ/, /ð/ or /t/ in five examples.
- Feel: check tongue position and voicing.
- Produce: say five words slowly.
- Contrast: alternate three/tree, thin/tin, then/den.
- Transfer: say one complete sentence naturally.
Short accurate practice repeated across days is usually more useful than one long session followed by no return.
How to measure progress
- Can the learner hear the sound reliably?
- Can they produce it in isolation?
- Does it survive inside words?
- Does it survive reading aloud?
- Does it survive spontaneous conversation?
- Can the learner self-correct without being prompted?
The final two are the strongest signs of transfer.
What not to conclude
- A local or international accent is not evidence of weak intelligence.
- Every /th/ spelling is not pronounced identically.
- Pronunciation alone does not determine oral-communication quality.
- Slow drill performance does not guarantee spontaneous transfer.
- The purpose is intelligible, flexible communication—not accent erasure.
Current English route
- SEAB 2026 PSLE English Language syllabus
- How to Build Strong PSLE English
- Learning English in Singapore as an International Student
Hear the Contrast Before Forcing Production
Learners often improve pronunciation faster when they first learn to hear the contrast reliably. If three and tree sound identical to the learner, production practice may become guesswork. Begin with listening pairs before asking for repeated speaking.
Minimal-Pair Practice
| /θ/ | /t/ |
|---|---|
| three | tree |
| thank | tank |
| thin | tin |
| thought | taught |
Say one word at random and ask the learner to point to the correct column. Only after the distinction is heard consistently should speed increase.
Voicing Separates /θ/ and /ð/
The tongue position for /θ/ and /ð/ is similar, but /ð/ uses vocal-fold vibration. Place two fingers lightly on the throat: three should have little or no voicing at the opening; the should vibrate.
Common Substitutions
- /θ/ may become /t/, /f/ or /s/ depending on the speaker’s language background.
- /ð/ may become /d/, /v/ or /z/.
- These substitutions are systematic speech patterns, not evidence of laziness or low ability.
From Word to Sentence
A sound that is clear in an isolated word may disappear in natural speech. Transfer practice should therefore move through levels: sound → word → short phrase → sentence → spontaneous conversation.
- /θ/ alone.
- three.
- three trees.
- Three trees stood beside the road.
- Describe a picture using several target words.
Pronunciation, Accent and Intelligibility
The goal is not to erase a Singaporean or any other accent. Accent carries identity and community. The educational goal is intelligibility and control: can the learner produce the distinction when it affects meaning or clarity, especially in oral assessment or unfamiliar international communication?
A Two-Minute Daily Drill
- 20 seconds listening discrimination;
- 30 seconds slow production;
- 30 seconds word pairs;
- 40 seconds full sentences.
End State: Deliberate Control, Natural Speech
Strong pronunciation practice gives the learner a physical and auditory model of the sound. The final goal is not exaggerated articulation forever. It is enough control that the contrast survives ordinary speech when clarity matters.