Didn’t God say “I AM WHO I AM”?

Every boy know this verse. I am who I am. But no, this is not what God said. Let me explain. Moses asking God, when I go to the Israelites, what should I tell them? Who sent me? God is saying in the original language, Hebrew, I will be with I will be. And repeat again, tell them I will be send God. Give Moses a very important secret. It's actually a verb in Hebrew talk about the future. I will be with you all the time. Even when Pharaoh would say no again and again just for you to know that I will be with you. The hardest part that God going to show to the people of Israel is a process of faith. Trust when you don't see God. When you don't understand but you trust that in the future you will understand was all for you for your good. That's why God represent himself with future tense verb. But you don't forget that they need to know. That's why in verse 15 he said I'm the same God of Abraham, Isaac and Jacob. Don't worry, I'm the same one from the past, the present, and [music] the future. Does it make sense for you? Let me know in the comment.