Grammar

adjective

Adjectives that end with the hiragana letter are called adjectives.

Examples

あつ

  たか  

おいし

かわい

きれいkirei (beautiful), きらいkirai (don't like), and ゆうめいyūmei (famous), etc. are exceptions. They are なna adjectives even though they end with the letter いi.

adjectives conjugate !

That means they change forms when used in a negative or past tense.

Replace the last いi with くないkunai to convert affirmative
to negative.

Replace the last いi with かったkatta to convert present tense
to past tense.

present

おもしろ(です)

past

おもしろかった(です)

おもしろくない(です)

おもしろくなかった(です)

Because adjectives themselves conjugate, the verb "to be" ですdesu always remains present affirmative.

irregular adjective いい

The adjective いいii (nice, good) is irregular.
But it's a frequently used adjective so let's memorize its conjugation.

Replace the last い(i) with くない(kunai) and change the first い(i) to よ(yo) to convert affirmative to negative.

Replace the last い(i) with くない(kunai) and change the first い(i) to よ(yo) to convert affirmative to negative.

present

いい(です)

past

いいかった(です)

いいくない(です)

いいくなかった(です)

Example phrases using adjective

あたらしい カメラ

かいました

I bought a new camera.

おいしかったです

たかくなかったです

It was delicious, but it was not expensive.

adjective

The adjectives that don't end with the hiragana letter are all adjectives.

Examples

しず

 べん 

しんせ

きれいkirei (beautiful), きらいkirai (don't like), and ゆうめいyūmei (famous), etc. are exceptions. They are なna adjectives even though they end with the letter いi.

If you don't read Hiragana....

Some adjectives such as "be n ri" (convenient) end with the sound " i " when transcribed in rōmaji. But when written in Japanese letters, the last letter of "benri" is , not . Therefore, "benri" is not adjective but adjective. A good rule to remember is that adjectives always have another vowel immediately before the last vowel " i " (eg: takai, atsui, tanoshii, etc.) when written in rōma-ji.

adjectives do not conjugate,
so the verb "to be" です conjugates. Just like in English !

present

しんせつ (です)

past

しんせつ (でした)

しんせつ (ではありません)

しんせつ (ではありませんでした)

When describing nouns

when a な(na) adjective is placed right before a noun, な(na) should be added at the end of the adjective. That's why they are called "な(na) adjective" ! This doesn't change the meaning of the sentence, it is just a grammatical rule.

ジョー

しんせつ ひとです

Joe is a kind person.

ハワイ

きれい しま です

Hawaii is a beautiful island.

Learning how to use adjectives is very important, as they are a large part of the vocabulary.
Once you feel confident with adjectives,
you can go ahead and move on to sentence models !

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