In order to answer your question, we must first define sin. Sin in Greek means missing the mark. Yes we miss the mark everyday. But there is a difference between willful habitual sin, verses unintentional ignorant isolated sins. No you cannot be intentionally willfully sinning everyday and still be saved. But yes, we are saved the moment we turn from sin and put our trust in Jesus Christ. And by turning from sin, what I mean is, you decide no longer to willfully live in sin. But yes, we are not perfect and we will sin even after we are saved, but it is no longer a willful habitual sin, rather it is unintentional ignorant isolated sins. And because we still miss the mark everyday, we must sask for forgiveness everyday as instructed in the Lord's prayer. Jesus is not so much concerned with what you did, but rather how you humble yourself and confess that you have fallen short.