In casual American English, "She is poor" sounds like "shee ihz PUUR". Two things happen here, and the headline one is the Vowel-to-Vowel Linking: a tiny W or Y glide bridges the two vowels. 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 makes this sentence sound American.
Between "she" and "is", a brief "" glide bridges the two vowels for smooth flow. This is called the Vowel-to-Vowel Linking, a tiny act of laziness that makes the rhythm feel right. It comes out as shee.
What's happening in this sentence.
Small tricks that turn a textbook sentence into how an American actually says it.
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 "" and "", a brief "" 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.
"she" 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.