Japanese Adverbs: How to Make Them and Which to Learn

What an adverb changes in your speech

A beginner sentence states a fact: nihongo o benkyō shimasu. An adverb tells the listener how that fact sits in your life. Mainichi nihongo o benkyō shimasu is a routine, sukoshi benkyō shimasu is an admission, and motto benkyō shitai desu is an intention. None of that requires new verbs or new grammar patterns. It requires one extra word placed before the verb, which is why adverbs give more conversational range per hour of study than almost anything else at beginner level.

Japanese also uses adverbs where English would change the verb entirely. Instead of a separate word for hurry, a speaker often says hayaku plus the ordinary verb. Instead of one word for whisper, chiisai koe de or shizuka ni does the work. Learning to reach for an adverb rather than hunting for a rare verb keeps you talking at your current level.

The formation rules at a glance

Only the first three rows are conjugation. Everything else is vocabulary, which is good news: the majority of the adverbs you will use daily are fixed words you simply memorise and place before the verb. Start by learning which of the three groups a new word belongs to, because that decides whether you ever change its ending.

I-adjectives become adverbs with ku

Take the dictionary form, remove the final i, and attach ku. Hayai becomes hayaku, osoi becomes osoku, ōkii becomes ōkiku, yasui becomes yasuku, tanoshii becomes tanoshiku. The one word that breaks the pattern is ii, which reverts to its older form yoi and becomes yoku. Warui becomes waruku with no surprises, so only ii needs special attention.

The negative works the same way, because nai is itself an i-adjective: hayaku nai means not fast. This is also the form that appears before naru and before the verb suru when you cause a change, as in ōkiku shimasu for make it bigger.

Na-adjectives become adverbs with ni

Na-adjectives need no surgery at all. Keep the word and add ni: shizuka ni, kantan ni, jōzu ni, genki ni, taisetsu ni, kirei ni. The na itself only appears when the adjective sits directly in front of a noun, so shizuka na heya but shizuka ni shimasu. Learners who confuse the two usually produce shizuka na shimasu, which sounds clearly wrong to a Japanese ear.

A handful of nouns behave the same way in fixed expressions: issho ni for together, hontō ni for really, toku ni for especially. Treat these as whole words rather than as a rule about nouns, because most nouns cannot take ni this way.

Where the adverb sits in the sentence

Japanese word order is flexible for adverbs, but two habits keep you safe. Frequency and time adverbs feel natural near the front, often right after the topic. Degree adverbs sit immediately before the adjective or verb they measure, because they need to touch what they modify. The verb still finishes the sentence, so no adverb should follow it.

Both kyō wa itsumo yori isogashii desu and itsumo yori kyō wa isogashii desu are grammatical; the first is the ordinary spoken order. When you are unsure, put the adverb directly before the verb group and you will almost never be wrong.

Frequency words and the negatives two of them demand

The frequency set is small and answers the question dono kurai. Itsumo is always, taitei is usually, yoku is often, tokidoki is sometimes. Then come the two that behave differently: amari means not much and zenzen means not at all, and both require the verb to end in a negative form. Amari mimasen, zenzen wakarimasen. Metta ni for rarely follows the same negative rule.

You will hear zenzen used with a positive verb in casual speech, in the sense of totally fine, but keep it with the negative in polite conversation until you are confident about the register. The dedicated question-words guide covers dono kurai and how to ask about frequency; here the aim is answering.

A natural reply to any of these is sō nan desu ka, or a follow-up question such as dono kurai desu ka. Prepare one frequency sentence about your study, your commute, and your cooking, because those three come up in almost every first conversation.

Degree words for how much

Sukoshi and chotto both mean a little, but chotto is the softer, more conversational one and doubles as a polite refusal: chotto muzukashii desu means no in most workplaces. Sukoshi sounds slightly more measured and fits written or formal speech. Hijō ni is a formal register word for presentations and reports rather than a chat with a friend, where totemo or sugoku does the same job.

Motto is the workhorse for asking someone to adjust: motto yukkuri, motto ōkii koe de, motto kudasai. Because it means more, it never needs a comparative form on the adjective.

Time, order, manner, and the mimetic words

Three small groups cover nearly all remaining daily use. Time adverbs place the action on a line: ima, mō, mada, sugu ni, ato de. Order adverbs say who or what comes first: saki ni, kore kara, tsugi ni. Manner adverbs describe the shape of the action: yukkuri, chanto, hitori de, jibun de.

Watch the pair mō and mada, since learners mix them constantly. Mō with a positive verb means already, mada with a negative means not yet, and mada with a positive means still. Mō tabemashita and mada tabete imasen are the two you should be able to produce without pausing.

A large family of manner adverbs comes from sound and mimetic words: yukkuri, hakkiri, shikkari, chanto, dandan, bikkuri, pera pera. Many of them can take the particle to before the verb, which makes the description feel a little more deliberate, and many are equally natural without it. Yukkuri to arukimashita and yukkuri arukimashita are both correct.

A few of these attach to suru rather than standing alone: bikkuri shimashita for I was surprised, and shikkari shimasu for pulling yourself together. The onomatopoeia guide on this blog covers the sound words themselves; what matters here is that they slot into exactly the same position before the verb as any other adverb does.

Naru: saying that something became different

Naru means become, and it takes exactly the adverb forms above. An i-adjective supplies its ku form, a na-adjective and a noun supply ni. Samuku narimashita, jōzu ni narimashita, isha ni narimashita. This one pattern lets you describe change in the weather, in your ability, in a price, and in your feelings without learning a single new verb.

The polite past narimashita is the form you will use most, because change is usually reported after the fact. Its close partner is suru, which makes the change deliberate: ōkiku shimasu means I will make it bigger, while ōkiku narimasu means it gets bigger on its own.

Forty adverbs worth learning first

Learn these in the order given rather than alphabetically. The first fifteen appear in almost every conversation, the middle group adds precision, and the last ten mostly mark register: hijō ni for a report, yappari and nakanaka for relaxed speech among friends.

The mistakes that cost the most

• Saying ii ku instead of yoku. Drill yoku wakarimasen until it is automatic.
• Leaving the verb positive after amari or zenzen. The negative ending completes the meaning.
• Keeping na before a verb: say shizuka ni shimasu, not shizuka na shimasu.
• Placing the adverb after the verb, English style. In Japanese the verb closes the sentence.
• Using hijō ni with friends. It is a formal word, so totemo or sugoku fits casual speech better.