When will letter B remain silent? The letter 'b' can act as a silent letter when it comes before 't' or if it comes after 'm'. Words such as 'comb', 'tomb', 'bomb', 'debt', and 'doubt' are good examples of the 'b' acting as a silent letter. Of course, there are always exceptions to this rule; the word 'obtain' doesn't abide by the rules. Follow our channel for more information https://www.facebook.com/profile.php?id=100069435196271&mibextid=LQQJ4d #phonics #grammar #spellingrules | Genius Phonic