1)If you missed the 讝诪谉 of any 转驻讬诇讛 due to something out of your control (讗讜谞住), you should daven 砖诪讜谞讛 注砖专讛 twice at the next 转驻讬诇讛. 馃毝馃徏鈥嶁檪锔忦煆庯笍馃殤
2)If you intentionally missed though, then you cannot make it up at the next 转驻讬诇讛, in this case, you snooze, you lose. 馃檮馃槾
3)What if you got woken up for 砖讞专讬转 then fell asleep and missed the 讝诪谉, is that 讗讜谞住 or not? It is not, and you can make it up, but you should most definitely try your hardest to wake up for 砖讞专讬转 讘讝诪谞讛. 馃ケ馃槷馃槹