The Difference Between 良い and いい

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Nov 8, 2015 23:07
The Difference Between 良い and いい

Both 良い and いい can be used to modify nouns; both can be used as predicates that mean "to be good." However, there are differences between the two in use:

(1) 良い can be inflected to 良く, but いい cannot.
(2) いい can be followed by sentence-ending particles such as よ, な, なあ and ね, but 良い cannot.

この車は良くない。 (Correct) This car is not good.
この車はいくない。 (Incorrect) This car is not good.

Hiroshi: あした新幹線で東京に行くんだ。 I am going to Tokyo by Shinkansen tomorrow.
Makoto: いいなあ。 (Correct) I am envious of you.
Makoto: 良いなあ。 (Weird) I am envious of you.
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