Americans pronounce "He is happy to be here" as "hee ihz HA-pee tuh bee HEER" in casual speech. Two things bend the textbook pronunciation. The headline is the Vowel-to-Vowel Linking — a tiny W or Y glide bridges the two vowels. It lands on he, the way sentences stop sounding like a list and start sounding like speech. Keep stressed words long, unstressed words short, and link the consonants forward into the vowels.
Now you try.
Read the sentence out loud at native speed. The mic stays on your device — nothing's uploaded.
What's happening in this sentence.
Small tricks that turn a textbook sentence into how an American actually says it.
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Common pronunciation mistakes in American English.
The textbook way isn't wrong — it's just not how anyone actually says it.
Leaving a gap between two vowels.
Between "he" and "is", a brief "y" glide bridges the two vowels for smooth flow. A brief glide (y or w) bridges two vowels for smooth flow.
Pronouncing the function word too fully.
"he" is a function word — in connected speech, the full vowel reduces to a quick "hee" sound and consonants may simplify. Full vowel reduces to schwa /ə/ or other weak vowel. Consonants may simplify.