Yes, you can, if you are not using a back-up
birth control method or if you are and the back-up fails. In fact, if you miss three or more with most, they tell you to start over again with a new pack. And the sugar pills don't really matter. They're just reminder pills so you start your new pack at the right time. From everything I've read, your pill needs to be taken 24 hours apart and not much longer if you do go past to be at maximum efficacy.