Boost Up English



Book 15-Minute Quick Check

The AH [ɑ] Vowel Sound
in American English

This is the vowel sound in father, honest, and calm — and it plays a huge role in how natural your speech sounds in professional settings.


Book 15-Minute Quick Accent Check

Common AH [ɑ] Words (Professional & Everyday)

father  •  problem  •  colleague  •  technology  •  policy
process  •  possible  •  college  •  project  •  product
knowledge  •  quality  •  economy  •  conference  •  response
popular  •  politics  •  concept  •  conflict  •  option
object  •  positive  •  modern  •  common  •  stock

AH [ɑ] vs UH [ʌ] — The Real Difference

AH [ɑ] (father)

More open — about two fingers of vertical space. Jaw drops more, more space in the back of the jaw, back of the tongue lowers.

UH [ʌ] (butter)

More neutral — about one finger of space. Tongue stays centered and relaxed, less opening overall.

Minimal Pairs

gut / got
bud / bod
luck / lock
run / Ron
bug / bog
cluck / clock
shut / shot
not / nut

Real-Life Practice Sentences

• The sun was hot.

• He shut the lock.

• I love the dog.

• The bug is on the box.

• The button at the bottom was rotten.

• Bob’s my brother.


Book 15-Minute Quick Accent Check


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Book 15-Minute Quick Accent Check
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