Modifying Japanese Adjectives to Adverbs

Recall that an adverb is usually used to modify a verb, just as an adjective is usually used to modify a noun. In English, in general, you add “ly” to change adjectives to adverbs. For example, aggressive is an adjective and aggressively is an adverb. In Japanese, there is also a regular way to change adjectives to adverbs, as follows:

い-adjective: change い to く

な-adjective: change な to に

Exception: change いい (good) to よく (well).


早いはやい)is an い-adjective which means early. When it is used as an adverb, change い to く and it becomes 早く.

Please get up early.
早い to 早く.

Unlike English, which you may put adverb either before or after the main verb in a sentence, you usually put the Japanese adverb before the main verb.

静かしずか)is a な-adjective which means quiet. When it is an adverb, it becomes 静かに.

Please walk quietly at the library.
静か is a na-adjective.

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