Do you need grammar to speak a language?

Two ways to fail

The first failure is the school one. Years of lessons, every tense in a table, a test on the tables, and at the end of it a person who can explain the difference between two cases and cannot use either in a sentence. They learned grammar the way you learn history: as facts about the language, stored next to the language and never inside it.

The second failure is the reaction to the first. Skip the rules, get input, speak, and let the grammar sort itself out the way it did when you were three. This works for a while. Then it stalls at a level where you are understood and wrong, and stays there for years, because nobody corrects an adult who is being understood, and you cannot hear your own mistakes in a rule you never learned.

Both camps are right about the other one. The question is what a rule is for, if it is not for reciting and not for skipping.

A rule is a shortcut

Children learn the endings of a language from tens of thousands of hours of hearing them. Adults do not have those hours. A rule is a compression of that experience: after u and na, when you are saying where something is, the noun takes this ending. Reading it takes thirty seconds. Working it out from input alone takes months and often never finishes.

So the rule is worth reading. Once. What it is not worth is memorising, because a memorised rule sits in the same place as a memorised date, and that place is far too slow to reach while you are speaking. The rule has to move from something you know to something you do, and there is exactly one way that happens.

Grammar is learned by producing

Every time you write a sentence that needs the locative, you apply the rule. The first few times you consult it: where, so u, so the ending is -u. The twentieth time you hesitate less. By the fiftieth, in a new sentence about a new place, the ending comes out before the rule does. That is the moment the grammar stopped being theory. It did not come from re-reading the explanation and it did not come from tapping a tile; it came from producing the form, many times, in sentences that meant something.

This is why the amount of practice per rule matters more than the quality of the explanation. A rule with three example sentences is a rule you have understood. A rule with fifty sentences behind it, spread over weeks, is a rule you have.

What the course does with a rule

Every lesson is built around one rule. You read it, explained in your own language, and a short quiz checks that you understood it. Then the lesson gives you the words the rule needs, and then you write: sentence after sentence, each one needing the rule, each one typed from scratch and checked word by word. You cannot reach the text or the dialogue of a lesson before you can write its sentences.

After the lesson, the rule does not go away. It has a level from 1 to 10, like a word, and it comes back when it is due, inside sentences from later lessons that happen to need it. If you produce the wrong ending, the check names the rule that broke and the rule's level halves, so it returns sooner. A rule you keep getting right drifts off towards a review every two weeks, then every month, and eventually you would have to look up what it said, because you have not thought about it in a year. You just use it.

So, do you need it?

You need to read it, once, in a language you understand. You need to produce it, hundreds of times, in sentences that are checked. And you need something that notices when it fails and brings it back. What you do not need is to be able to recite it, and what you cannot do is skip it. The rule is not the destination. It is the fastest road to not needing the rule.