(I am not a teacher) The problem with the pronunciation of English is that there are many accents. If you are looking to study pronunciation, there are many examples out there to emulate (movies, TV, Youtube videos, etc.) My suggestion is to watch American newscasters and emulate their accents and pronunciation. The reason I say this is that, generally, newscasters are educated, they are required to have good pronunciation, and US newscasters for the most part do not have strong regional accents.
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