()

よい
i-adjective
good, fine
See also: いい (casual/everyday form)
Conjugation
AffirmativeNegative
Present()()くない
Past()かった()くなかった
て form()くて()くなくて
Adverbial()
Conditional ば()ければ()くなければ
Conditional たら()かったら()くなかったら
1. good, fine
Of high quality or standard.
天気(てんき)()い。
The weather is good.
This restaurant has good food.
The scenery is beautiful, isn't it?
He is smart.
Let's eat food that's good for the body.
2. all right, okay
Acceptable or permitted.
You may go home now.
May I take a photo?
May I sit here?
You don't have to eat it.
Is tomorrow okay?

()い is an i-adjective meaning "good." Its irregular alternative いい is the ordinary form in everyday speech.

USAGE:

  • よい is the more formal, written, and older-sounding form; いい dominates conversation
  • よい persists in set phrases and greetings: よい(とし) (have a good new year), (なか)よく (on good terms)
  • Whichever dictionary form is used, everything else conjugates from よ-, never い-

FORMS:

  • Dictionary: よい or いい (いい is more casual)
  • Negative: よくない (NOT いくない)
  • Past: よかった (NOT いかった)
  • Adverb: よく (well, often)

GRAMMAR PATTERNS:

  • 〜てもよい / 〜てもいい: may ~, it's okay to ~
  • 〜ばよかった: should have ~ (regret)
  • 〜なくてもいい: don't have to ~

COMMON COLLOCATIONS:

Related Words