い形容詞

## What it means い-adjectives are describing words that tell you what something is like — big, small, tasty, boring. Almost every adjective ending in **い** belongs to this group, and the great thing is that these words can change form all on their own, without any extra help.

## When to use it Take the plain form, like おいしい (tasty). For polite present tense, just add です: おいしいです. To say "not tasty," drop the final い and add くない: おいしくない. For the past ("was tasty"), drop the い and add かった: おいしかった. And for "was not tasty," drop the い and add くなかった: おいしくなかった. です itself never changes — the adjective is doing all the conjugating.

## Don't confuse it with It's easy to assume です controls the tense, the way it seems to with な-adjectives. It doesn't. A common beginner mistake is writing おいしいでした for "it was tasty" — that's wrong. The い-adjective must change to おいしかった, and です only gets added afterward for politeness (おいしかったです).