Rules of reading
Please, help me to find rules about correct pronunciation english sounds.
E.g., there are three words: contain, totally and politic. All of them consist of a letter "o". But in the first case, we pronounce the sound [ə], in the second - [əʊ], in the third - [ɒ]. I understand that I need remembering such words, but I would like to read some rules about it.
And my main mistake is that I cannot put the correct accent in some words. Maybe, you know the rules about it too.