Then there are other sounds that you don't have to pronounce in french like the d sound or the t sound that just come by the ending of the word ( ex ( to understand or to comprehend : comprendre ) je comprends, tu comprends, il comprend .. for all these several conjugation the pronunciation is the same : " compron " the difference is only in the first part where you add je or tu or il!
So what I have to say the best way to get fluent at french and figure out how to pronouce these verbs and nouns with silent sounds is to watvh french tv programs ! Good channels would be : france 2, france 3, france 5 , tv5 monde, M6 , NRJ and others