WEAK FORMS: Why 'natives' and 'non-natives' sound different

Many of the commonest words of English are pronounced in a special reduced way, by Brits, Americans & others. Even by famous, admired speakers. Even in careful, formal speech! Fry's English Delight: https://www.bbc.co.uk/programmes/p00xr7wp Judi Dench in Westminster Abbey: https://www.youtube.com/watch?v=Hw9fPoV8MK8 The Queen: https://www.youtube.com/watch?v=2klmuggOElE Tom Hiddleston reading Byron's poem: https://www.youtube.com/watch?v=X1nVVlA2zUk