20 TH tongue twisters for the sound your language probably doesn't have

TH barely exists outside English. German speakers say "zree," French speakers say "sree," Russian and Polish speakers reach for "free," and half of London says "free" too, natively. If "three" comes out of your mouth as anything but "three," you're in the world's largest club.

The fix is mechanical, not mysterious: tongue tip between the teeth, air pushed through the gap. It feels wrong at first — most languages train you to never stick your tongue out mid-word. Twisters are how you make the new position automatic.

Know your two TH's first

English hides two different sounds behind one spelling:

• Soft TH (voiceless) — think, three, mouth, thirty. Just air, no voice.
• Hard TH (voiced) — this, that, mother, weather. Same position, vocal cords on.

Put a finger on your throat: "think" = no buzz, "this" = buzz. Every twister below marks which one it drills.

Soft TH drills (think, three, thirty)

1. Three thin things. (×5)
2. Thirty-three thirsty, thundering thoroughbreds thumped Mr. Thurber on Thursday.
3. He threw three free throws.
4. Thin sticks, thick bricks.
5. Three free thugs set three thugs free.
6. I thought a thought. But the thought I thought wasn't the thought I thought I thought.
7. The thirty-three thieves thought that they thrilled the throne throughout Thursday.
8. Through three cheese trees three free fleas flew.
9. Tom threw Tim three thumbtacks.
10. Six thick thistle sticks. Six thick thistles stick.

Number 3 is the classic diagnostic: "threw–three–free" forces the exact TH/F contrast that betrays most learners.

Hard TH drills (this, that, those)

11. This is the thing that thrilled them there.
12. They threw them there, then and there.
13. The brothers bathed in the smooth, seething sea.
14. Whether the weather is warm, whether the weather is hot, we have to put up with the weather, whether we like it or not.
15. Those thousand thinkers were thinking how the other three thieves went through.

Mixed TH (both types colliding)

16. The father gathered leather together for the weather.
17. Thirty thousand thoughtless boys thought they'd make a thundering noise.
18. I thought of thinking of thanking you thoroughly.
19. Nothing is worth thousands of deaths.
20. The sixth sick sheikh's sixth sheep's sick. (TH meets S meets SH — the final exam, borrowed from the hard list.)

How to drill TH

1. Mirror check. Say "three." If you can't see your tongue tip between your teeth, it's not TH yet — it's T, F, or S wearing a costume.
2. Exaggerate. Stick the tongue out comically far for a week of practice. You'll retreat to the natural position on your own; starting subtle just means starting wrong.
3. Minimal pairs. "Three–free, thin–fin, that–zat, think–sink" — ten slow reps each. The contrast trains your ear as much as your mouth.
4. Record and verify. The cruel part of TH: if your language doesn't have it, your ear rounds your own "free" up to "three." You cannot self-correct what you can't hear. The tongue twister test scores each sound's clarity from the recording, so the verdict doesn't depend on your ear.

TH is also one of the loudest accent markers in English — often the single sound that flags a speaker as non-native. If you're working on your accent more broadly, start with the accent test to see which sounds are actually giving you away; it's usually fewer than you think.