Can You Teach Me Grammar?

I often hear my students tell me, I keep making the same mistakes over and over. So this must mean that I need to learn the rules better. Can you teach me grammar? Right? However, there's a problem with this theory. When they're actually having a real conversation with someone, they can't think of these rules. These rules don't actually help them in a real conversation. This is a perfect example of that. In summary, grammar and knowing grammar rules doesn't actually translate to fluency when you're speaking in a normal conversation. That wouldn't happen because they would just apply the rules and speak correctly. But unfortunately, that's not how it works in language learning