Japanese grammar

Adjectives
There are two types of adjectives, na-adjectives and i-adjectives.
I-adjectives always end with the vowel pairs -ai, -ii, -ui or -oi, and never -ei or a consonant followed by -i.
There is no real rule about what a na-adjective looks like, so they are everything else


To modify a noun with an i-adjective, just place the adjective before the noun.
kuroi neko - black cat
atsui ocha - hot tea

To modify a noun with a na-adjective, you must insert the word na between the adjective and the noun.
taisetsu na mono - important thing
kirei na onna no ko - pretty girl


Predicative Adjective :Something wa/ga adjective desu.
Using adjectives as predicates in the past tense is similar, by changing the -i at the end to -katta.

Watashi no kuruma ga aoi desu. My car is blue.
Watashi no kuruma ga aokatta desu. [I 's car sj "was blue" (is).]My car was blue.