In casual American English, "I thought you were going to be here" sounds like "ahy THAHT yoo wer GOH-uhng tuh bee HEER". Two things happen here, and the headline one is the Flap T Across Words: the T at the end of one word flaps into the vowel that starts the next. Keep stressed words long, unstressed words short, and link the consonants forward into the vowels.
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What makes this sentence sound American.
The "t" at the end of "thought" links to the vowel starting "you" — it flaps to sound like a quick "d", with the tongue briefly tapping the ridge behind the upper teeth. This is called the Flap T Across Words, the way sentences stop sounding like a list and start sounding like speech. It comes out as THAHT.
What's happening in this sentence.
Small tricks that turn a textbook sentence into how an American actually says it.
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Each word has its own page with examples, common mistakes, and related words.
Common pronunciation mistakes in American English.
The textbook way isn't wrong — it's just not how anyone actually says it.
Hard T at the end of a word, not a flap.
The "t" at the end of "" links to the vowel starting "" — it flaps to sound like a quick "d", with the tongue briefly tapping the ridge behind the upper teeth. Same flap as within-word (R1) but spanning two words.
Pronouncing the function word too fully.
"you" is a function word — in connected speech, the full vowel reduces to a quick "" sound and consonants may simplify. Full vowel reduces to schwa /ə/ or other weak vowel. Consonants may simplify.