Language is a skill that our brains acquire while we grow up by the time passes. A language can be acquired more than learning it. The only way to acquire a language is listening at first then speaking. While we grow up we listen 2 years and then we talk. It's like walking or driving a car or riding a bike etc. So we have to do more listening and speaking practice more than memorizing grammar rules or meanings of words. By the time our brains absorb the rules by itself. Then maybe we won't even know the names of the rules but we eventually will know them and use them well.