Quote Originally Posted by Antonio1986 View Post
So there is not a general rule that says when to stress the four prepositions: со, до, об and от.
Лично всегда я изпользую произношение "sa","da", "aб" и "ат" потому что думаю что русские используют это произношение чаще. правильно?
Prepositions are rarely stressed, they are normally unstressed. The rules of vowel reduction are applied to them. At the word initial position and in the prestressed syllable they are pronounced with [a], in other positions the vowel is realized as a shwa.