Katta (+) and Na-katta (-)

Anyone else get completely confused by these two? Nakatta being past negative for U endings and katta as past positive for I-adjectives? It’s the small details between similar tenses that keep tripping me up and stress me out!

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I definitely remember the times where all the grammar basics felt like such a confusing mess to remember.

~ない is technically an auxiliary adjective. That’s why it changes in the same way as any other い-adjective.

So it’s not that past negative is ~なかった. Negative is ~ない and given that it operates in the same way as all fellow adjectives, it drops the final い and has かった added.

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I don’t remember that one specifically tripping me up (and as mentioned the way to think of it is ない → なかった the same as i-adjectives), but one kinda similar thing that I definitely remember being confused by is how a command or request ending in な might mean “do X” or “DON’T do X.”

Turns out it’s because the “do X” version is なさい shortened, while the “DON’T do X” is just な appended directly to the る form of a verb, so the way to tell them apart is the form of the verb itself:

これを食べな。
Eat this.
これを食べるな。
Don’t eat this.

… boy was I glad to learn about that after quite a bit of “wait, this one’s a positive request? I thought な meant a negative command??”

It’s all just about slowly learning what to look for…

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