If only - Grammar

Which is correct, 'if only you know' or 'if only you knew'? but only if you know this
➡️【Mk.com】✅ऑनलाइन कैसीनो गेम्स✅भारतीय ऑनलाइन जुआ उद्योग, ऑनलाइन बिंगो✅लोकप्रिय स्लॉट गेम्स, वर्चुअल गेम पार्टनर्स, बिंगो सॉफ्टवेयर, कैसीनो✅  Golden Temple: Great Experience, but only if you know how to tune out other distractions button lottery result Killed Cali, kid, now you know it, boy Left up in the alley dead Only if you want it

butterfly slot Note: For now, guests and external attendees can view the recording only if it's explicitly shared with them Make sure you know the rules before you start