Japanese Grammar Exercise: na-adjective and i-adjective

Japanese Adjective

Before starting the exercise for na-adjective and i-adjective, please clarify any doubts you may have about the grammatical rules by referring to your grammar guidebook or dictionary. The Instantaneous Composition Method requires you to compose sentences with the target sentence pattern(s) over and over in order to use them almost effortlessly. You should already have the necessary knowledge.

Genki I - Lesson 5: Adjectives (present and past tenses)
Tae Kim's Guide - Adjectives

Instantaneous Composition Exercise for na-adjective and i-adjective

This is not a translation exercise. This is the Instantaneous Composition Exercise. As if a reflexive action, try to create an equivalent Japanese sentence shortly after reading an English script. Try not to think for more than three seconds.

Natural Speed with Pauses

English and Hidden Japanese Scripts

Ken is famous.
Takashi is not famous.
Shingo was polite.
This is an important book.
That is not an important book.
Today is hot.
Yesterday was cool.
This is delicious sushi.
That is not delicious sushi.
Tempura was not delicious.


When it comes to the negative state-of-being, there are two polite expressions, as shown below. We’re following the formal one. However, you should be familiar with both of them.

na-adjective (Ex. 有名ゆうめい famous)

  Casual Formal
Negative 有名じゃないです 有名じゃありません
Past-negative 有名じゃなかったです 有名じゃありませんでした

i-adjective  (Ex. 美味おいしい delicious)

  Casual Formal
Negative 美味しくないです 美味しくありません
Past-negative 美味しくなかったです 美味しくありませんでした

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