〜ます: The Polite Verb Ending | Japanese Grammar

〜ます is the verbal half of 丁寧語 — the ending you attach to a verb to make it polite toward the person you are speaking to. It is the polite counterpart of です (which handles nouns and adjectives), and together the two cover every predicate in the language. But 〜ます earns its own page for two reasons: it carries a full little paradigm of its own (negative, past, volitional), and the stem it sits on turns out to be the hinge on which all of honorific and humble Japanese is built.

What 〜ます actually is: politeness, not meaning

The most freeing thing to understand up front is that 〜ます adds no lexical meaning. 行く and 行きます describe the identical event — someone going somewhere. The only difference is register: 行きます signals courtesy toward the listener. This is why you can raise or lower the politeness of a sentence without touching its content, just by adding or removing 〜ます.

毎日日本語を勉強します。

mainichi nihongo o benkyō shimasu

I study Japanese every day.

Swap 勉強します for plain 勉強する and the fact reported is exactly the same; only the audience changes — 勉強する to a friend, 勉強します to a stranger, teacher, or interviewer.

Forming 〜ます: attach it to the ます-stem

〜ます attaches to the ます-stem (the 連用形／れんようけい, ren'yōkei) of the verb. The full mechanics of building that stem are on forming 〜ます — here is the summary you need:

Verb class	How to build the stem	Dictionary → ます
る-verbs (ichidan)	drop る	食べる → 食べます
う-verbs (godan)	final う-row kana → い-row	行く → 行きます; 飲む → 飲みます; 買う → 買います
irregular	memorize	する → します; 来る → 来ます（きます）

The one thing to watch is the う-verbs: the final syllable shifts up the い-row of the kana chart. 書く→書き, 話す→話し, 待つ→待ち, 飲む→飲み, and — the classic trap — 買う→買い (not ×買あ), because the "u" of 買う represents わ／い／う／え／お and the ます-stem lands on い.

週末はたいてい家で映画を見ます。

shūmatsu wa taitei ie de eiga o mimasu

On weekends I usually watch movies at home.

コンビニで水とお弁当を買います。

konbini de mizu to obentō o kaimasu

I'll buy water and a bento at the convenience store.

The 〜ます paradigm

Because 〜ます behaves like its own auxiliary, negation, tense, and mood are all marked on ます itself — you never re-conjugate the verb underneath. This is what makes the polite forms so beginner-friendly: the stem is frozen, and only the ending moves.

Function	Form	Example (行く)	Gloss
Non-past	〜ます	行きます	go / will go
Negative	〜ません	行きません	don't / won't go
Past	〜ました	行きました	went
Past negative	〜ませんでした	行きませんでした	didn't go
Volitional	〜ましょう	行きましょう	let's go
Volitional question	〜ましょうか	行きましょうか	shall we go? / shall I…?

Each of these has its own detailed page — the polite negative 〜ません, the polite past 〜ました, the past negative 〜ませんでした, and the volitional 〜ましょう — but here is the whole system in three natural sentences:

昨日は雨だったので、どこにも行きませんでした。

kinō wa ame datta node, doko ni mo ikimasen deshita

It rained yesterday, so I didn't go anywhere.

疲れたので、そろそろ一緒に帰りましょう。

tsukareta node, sorosoro issho ni kaerimashō

I'm tired, so let's head home soon, together.

荷物、お持ちしましょうか。

nimotsu, omochi shimashō ka

Shall I carry your bag for you?

Notice ましょうか in the last one: it turns "let's" into a polite offer ("shall I…?"), which is why it is the backbone of helpful gestures. And notice ました is the polite past — not anything like ×行きますた. The た of ました is baked into the fixed form ました; you never glue plain-past た onto ます.

The one place ませ survives: 〜ませ imperatives

The old imperative of ます, 〜ませ, has almost vanished, but it clings to a few frozen service-register phrases you will hear constantly. It is worth recognizing even though you will rarely produce it.

いらっしゃいませ。ご注文はお決まりですか。

irasshaimase. gochūmon wa okimari desu ka

Welcome. Are you ready to order?

どうぞこちらでお待ちくださいませ。

dōzo kochira de omachi kudasaimase

Please wait right here.

いらっしゃいませ (the shop greeting) and 〜くださいませ (softened requests) are the survivors; treat ませ as a recognition-only relic outside them.

〜まして: the polite te-form that links clauses formally

ます has its own て-form, 〜まして, and while you can normally just use the plain て-form and let a final 〜ます carry the politeness, 〜まして shows up in genuinely formal and business speech to keep the courteous register running through a joined clause. It is most common right before an expression of thanks or apology.

本日はお集まりいただきまして、誠にありがとうございます。

honjitsu wa oatsumari itadakimashite, makoto ni arigatō gozaimasu

Thank you very much for gathering here today.

ご連絡が遅くなりまして、申し訳ございません。

gorenraku ga osoku narimashite, mōshiwake gozaimasen

I'm very sorry that my reply is late.

You don't need to reach for 〜まして in ordinary polite conversation — plain て + a final ます is fine there. But recognizing it explains those set business openers, and it rounds out the paradigm: ます inflects for the te-form just like a verb, because functionally that is what it is.

The deep payoff: the ます-stem is the hinge of all keigo

Here is the reason mastering 〜ます matters far beyond politeness itself. The ます-stem — the 連用形 — is not just where ます attaches. It is the launch pad for the entire honorific and humble system. The productive honorific pattern is お + ます-stem + になる, and the productive humble pattern is お + ます-stem + する:

Verb	ます-stem	Honorific (お〜になる)	Humble (お〜する)
待つ	待ち	お待ちになる	お待ちする
読む	読み	お読みになる	お読みする
持つ	持ち	お持ちになる	お持ちする

So the same stem 待ち that gives you polite 待ちます also gives you honorific お待ちになる and humble お待ちする. Learn to build the ます-stem fluently and you have not just learned the polite present — you have learned the pivot that the whole of sonkeigo and kenjougo turns on.

お客様が受付でお待ちになっています。

okyakusama ga uketsuke de omachi ni natte imasu

A customer is waiting at the reception desk.

💡

The ます-stem does triple duty: (1) it hosts 〜ます / ません / ました, (2) it hosts the honorific お〜になる, and (3) it hosts the humble お〜する. Get the stem automatic and three big systems fall into place at once — this is the single highest-leverage form in polite Japanese.

Common mistakes

1. Conjugating ます itself as if it were a plain verb. Tense and negation live in fixed endings, not in glued-on plain-form pieces.

❌ 昨日、映画を見ますた。

Wrong — the polite past is the fixed 〜ました, never ます + plain past た.

✅ 昨日、映画を見ました。

kinō, eiga o mimashita

I watched a movie yesterday.

2. Inventing a past-negative by stacking plain forms.

❌ 昨日は行きませんだった。

Wrong — the polite past negative is 〜ませんでした, not ません + だった.

✅ 昨日は行きませんでした。

kinō wa ikimasen deshita

I didn't go yesterday.

3. Landing an う-verb on the wrong stem vowel.

❌ お土産を買あます。

Wrong — the ます-stem of 買う is 買い (i-row), so it is 買います.

✅ お土産を買います。

omiyage o kaimasu

I'll buy some souvenirs.

4. Slipping from 〜ます into plain form mid-conversation with someone who warrants politeness. Register whiplash reads as careless.

❌ 明日は九時に来ます。あ、でも遅れるかも、ごめん。

Whiplash — polite 来ます, then a sudden casual ごめん to the same listener.

✅ 明日は九時に来ます。もし遅れそうでしたら、ご連絡します。

ashita wa kuji ni kimasu. moshi okuresō deshitara, gorenraku shimasu

I'll come at nine tomorrow. If I look like being late, I'll get in touch.

Key takeaways

〜ます is a pure politeness marker toward the listener — it changes register, never meaning (行く ↔ 行きます).
It attaches to the ます-stem (連用形); the only real hazard is landing う-verbs on the い-row (買う → 買います).
The paradigm lives on the ending: ません, ました, ませんでした, ましょう / ましょうか — never re-conjugate the verb underneath.
ませ survives only in frozen service phrases (いらっしゃいませ, 〜くださいませ) — recognize it, rarely produce it.
The ます-stem is the hinge of all keigo: the same stem builds honorific お〜になる and humble お〜する, so mastering it unlocks sonkeigo and kenjougo too.

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