The lesson

3.5 Adjectives

AI-generated

Overview

Learn how Japanese adjectives work. This lesson introduces い-adjectives and な-adjectives, how they modify nouns, and how they end sentences in both plain and polite forms.

い-adjectives

い-adjectives end in い in their dictionary form.

Examples of い-adjectives:

い-adjectives come directly before a noun.

It is a high mountain.
It is an interesting movie.

They can also be used at the end of sentences without a need to use a verb like “to be”.

This book is interesting.
This shop is cheap.

Politeness is added with です.

な-adjectives

な-adjectives do not generally end in い (there are some exceptions).

Examples of な-adjectives:

They behave very similarly to nouns. However, when they describe another noun, instead of の they use な.

It is a quiet town.

To form a predicate using the な-adjectives (i.e. to say that something is such-and-such), the copula (です・だ) and its conjugations are used.

In casual speech, if nothing comes after だ, the plain copula can be omitted.

TensePolitenessExample
Presentplain
plain (omitted だ)
polite
This town is convenient.
Pastplain
I was energetic yesterday.
polite
The meeting was important.
Present - negativeplain
polite
Past - negativeplain
polite

Dialogue

Today is a hot day. In the morning, the town was quiet.

This town is small, but convenient. The station is close. There are many shops too.

Around noon, I went to a café. That café is clean and quiet. The coffee is cheap, but tasty.

The shop next door is famous. But it is very expensive.

At night, I went home. The room is quiet and feels good. Today was a good day.

New words

Grammar

TitleDescription
だ
plain copula for な-adjectives
だった
past plain copula for な-adjectives
ではない / じゃない
negative plain copula for な-adjectives
ではなかった
past negative plain copula for な-adjectives
~くない
negative form of い-adjectives
~かった
past form of い-adjectives
~くなかった
past negative form of い-adjectives

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