Polite Form of Japanese Adjectives

When you look up words in a dictionary, they are written in plain form which you would say casually in your daily life.

Polite Form for い-adjectives

You may change an an い-adjective phrase to polite form by adding です (polite form of verb to be) at the end of the sentences. Of course だ (plain form of verb to be) should be dropped, if it exists. It applies for present, negative and past tense forms.

Polite Form for な-adjectives

For な-adjectives, treat it like a noun and apply the same rules as the conversion between verb to be だ and です.

Related Grammar Points