The te-form (て形): how to build it and the ten ways it's used

There is a moment in every Japanese learner's first year when the language stops being a list of sentences and starts being a system. That moment is the te-form. Up to then you can say 食べます ("I eat") and 行きます ("I go"), but you cannot say "I ate and then went", "please wait", "I'm reading", "you may sit here", "don't smoke", "I've already finished it", or "my friend helped me out". Every one of those requires the same single conjugation. Learn to build it fluently and roughly ten separate grammar patterns open at once — which is why textbooks spend so much time on it, and why the payoff is so large. This guide covers the formation rules group by group, then walks through each of the ten uses with real sentences.

1. Why the te-form is the hinge of intermediate Japanese

The te-form has no meaning of its own. It is a connector: a form that leaves a verb hanging, unfinished, waiting for something else to attach. What attaches determines the meaning. This is unusual for English speakers, because English builds these ideas with completely unrelated machinery — "and", "please", "-ing", "may", "must not", "after", "try", "already". Japanese routes all of them through one form, which means the cost of learning it is paid once and the interest is collected for years.

There is a second, quieter reason to master it early: the te-form is tenseless. In a sentence like 朝ご飯を食べて、学校に行きました (あさごはんを たべて、がっこうに いきました — "I ate breakfast and went to school"), only the final verb 行きました carries past tense. The te-clause simply inherits it. Once you internalize that, long Japanese sentences stop looking intimidating: you scan to the end, read the tense and politeness there, and everything before it hangs off that anchor. That habit is the single biggest reading-speed upgrade available at the beginner-to-intermediate boundary. If your verb basics are shaky, work through the verb conjugation basics guide first — everything below assumes you can identify a verb's group.

2. Building the te-form, group by group

Japanese verbs come in two regular groups plus two irregulars. Ichidan verbs (一段動詞, often called ru-verbs) always end in -eru or -iru in their dictionary form: 食べる (たべる, eat), 見る (みる, see), 起きる (おきる, get up), 教える (おしえる, teach). Godan verbs (五段動詞, u-verbs) end in any of う・つ・る・む・ぶ・ぬ・く・ぐ・す. The te-form rule for ichidan verbs is trivial — drop る, add て — and the rule for godan verbs depends entirely on that final kana.

The いて / いで distinction is about voicing, not spelling

Learners frequently write ×泳いて for 泳ぐ. The fix is to stop treating いて and いで as two arbitrary rules and hear them as one rule: a voiced consonant in the stem drags the て along with it into で. く is voiceless, so it gives いて; ぐ is its voiced twin, so it gives いで. The same logic explains the んで row — む, ぶ and ぬ are all voiced nasals, so で follows — while the voiceless う, つ, る group gives って. Say 書いて and 泳いで out loud back to back and the pattern becomes something your mouth knows rather than something your notes know. Pronunciation habits like this are worth building deliberately; see the pronunciation guide for the voiced/voiceless pairs across the whole kana chart.

行く: the exception you will use every day

By the く rule, 行く (いく, to go) should become ×行いて. It does not. It becomes 行って (いって), following the って pattern instead. This is the only high-frequency irregularity in the whole system, and it is unfortunate that it lands on one of the most common verbs in the language. Note the written trap too: 行って (いって, "go and…") and 言って (いって, "say and…") are pronounced identically and are distinguished only by kanji and context. 駅に行って、切符を買いました (えきに いって、きっぷを かいました) — "I went to the station and bought a ticket."

Adjectives and nouns have te-forms too

The connector role is not limited to verbs. An i-adjective drops い and takes くて: 安い → 安くて. A na-adjective and a plain noun both take で: 静か → 静かで, 学生 → 学生で. So この店は安くておいしいです (このみせは やすくて おいしいです) — "This shop is cheap and delicious" — and 彼は学生で、日本語を勉強しています (かれは がくせいで、にほんごを べんきょうしています) — "He is a student and studies Japanese." The one irregular here is いい (good), which becomes よくて, never ×いくて.

3. Uses 1 and 2: linking actions, and making requests

Use 1 — sequence and cause. The bare te-form chains clauses. Its default reading is chronological order, and that order is not negotiable: whatever comes first in the sentence happened first. 起きて、顔を洗って、朝ご飯を食べました (おきて、かおを あらって、あさごはんを たべました) — "I got up, washed my face, and ate breakfast." The same form also expresses means — バスに乗って行きます (バスに のって いきます, "I'll go by bus", literally "riding a bus, I go") — and cause — 風邪をひいて、学校を休みました (かぜを ひいて、がっこうを やすみました, "I caught a cold and so missed school"). Japanese speakers keep these chains short; two or three clauses is natural, six is a run-on sentence in any language.

Use 2 — てください, the polite request. Add ください and you have the workhorse request form: ちょっと待ってください (ちょっと まってください) — "Please wait a moment." もう一度言ってください (もう いちど いってください) — "Please say that once more." The negative request does not use the te-form at all; it uses the ない-form plus で: 心配しないでください (しんぱいしないでください) — "Please don't worry." Writing ×心配しなくてください is one of the most common beginner errors, and it is worth over-drilling the correct shape now. For a softer, more deferential request, 〜ていただけませんか is the standard upgrade: 教えていただけませんか (おしえて いただけませんか) — "Could you possibly teach me?" That form belongs to the humble register covered in the keigo basics guide.

4. Use 3: ている — the pattern with two completely different meanings

This is the genuinely difficult part of the te-form, and it is difficult because English uses one form ("-ing") where Japanese makes a distinction that depends on the verb itself. ている has two readings, and which one you get is decided by whether the verb describes an activity that takes time or a change that happens instantly.

• Durative verbs → progressive ("is doing"). 読む, 食べる, 書く, 話す, 待つ, 降る all describe activities with duration. 今、本を読んでいます (いま、ほんを よんでいます) — "I'm reading a book right now." 雨が降っています (あめが ふっています) — "It's raining."
• Instantaneous-change verbs → resulting state ("is in the state of having done"). 結婚する, 死ぬ, 知る, 住む, 持つ, 来る, 開く describe a switch flipping. The activity is over in an instant; what ている describes is the situation afterwards.

The three examples that break learners are worth stating explicitly. 結婚しています (けっこんしています) means "I am married", not "I am getting married" — the wedding is long over. To say a wedding is currently in progress you would describe the ceremony, not use this form. 住んでいます (すんでいます) means "I live (somewhere)", the ordinary way to state your residence: 東京に住んでいます — "I live in Tokyo." The plain 住みます is almost never used for this; if you say ×東京に住みます you sound like you are announcing a future move. And 知っています (しっています) means "I know" — the moment of learning was instantaneous, so ている gives the ongoing state of knowing. This one has a famous asymmetry: the negative is 知りません ("I don't know"), not ×知っていません. Positive uses ている, negative drops it. There is no logic to rescue here; it is a fact to memorize.

Two more things ている does. It expresses habits and repeated actions: 毎朝コーヒーを飲んでいます (まいあさ コーヒーを のんでいます) — "I drink coffee every morning", which is not about this instant at all. And in casual speech the い drops out entirely: 何してるの？ (なにしてるの) — "What are you doing?" You will hear the contracted 〜てる far more often than 〜ている in conversation, so train your ear for both. The state reading also interacts heavily with transitive/intransitive verb pairs, where 開いている ("is open") and 開けている ("is opening it") describe entirely different situations.

5. Uses 4 and 5: permission (てもいい) and prohibition (てはいけない)

てもいい literally means "even if you do it, it's fine" — which is exactly how permission works. ここに座ってもいいですか (ここに すわっても いいですか) — "May I sit here?" 写真を撮ってもいいですか (しゃしんを とっても いいですか) — "May I take a photo?", possibly the single most useful sentence for a tourist in Japan. The affirmative answer is usually はい、どうぞ or いいですよ. A slightly stiffer variant, 〜てもかまいません ("I don't mind if you…"), appears constantly in signage and formal speech.

てはいけない is the mirror image: "doing it won't do." ここでタバコを吸ってはいけません (ここで タバコを すっては いけません) — "You must not smoke here." This is strong, rule-stating language — signs, teachers, parents — so as a learner you will read it far more often than you say it. When you need to stop someone politely, 〜ないでください is the softer choice. In casual speech てはいけない contracts to 〜ちゃいけない and ではいけない to 〜じゃいけない: 食べちゃいけない, 飲んじゃいけない. Note the shape of that contraction, because the same ちゃ/じゃ shortening shows up again in てしまう below.

6. Uses 6 and 7: てから (after) and てみる (try it and see)

てから is a sharper version of plain te-linking. Where the bare te-form simply lists events in order, てから insists that the first one finishes before the second begins: 宿題をしてから、テレビを見ます (しゅくだいを してから、テレビを みます) — "I'll watch TV after I finish my homework." It also has a second job as "since": 日本に来てから、三年になります (にほんに きてから、さんねんに なります) — "It's been three years since I came to Japan." Both uses are common, and the context makes which one is meant obvious.

てみる comes from 見る (to see) and means "do it and see how it turns out". 食べてみてください (たべて みてください) — "Try eating it (and see)." 着てみてもいいですか (きて みても いいですか) — "May I try this on?", which you can stack with the permission pattern from the previous section, as shown. Here is the trap: てみる is not "try to do" in the sense of attempting something difficult. "I tried to open the door (but it wouldn't budge)" is not ×開けてみた — the attempt-and-fail meaning belongs to the 〜ようとする pattern. てみる always carries the flavour of an experiment whose result you want to observe, which is why it pairs so naturally with food, clothes, and new places.

7. Uses 8 and 9: てしまう (finish / oops) and ておく (do it in advance)

てしまう is the most emotionally loaded pattern in this list, because it carries two meanings that sit oddly together until you see the common thread. The first is completion: 宿題を全部やってしまいました (しゅくだいを ぜんぶ やって しまいました) — "I got the homework completely done." The second is regret or unintendedness: 財布を忘れてしまいました (さいふを わすれて しまいました) — "I went and forgot my wallet." 電車の中で寝てしまった (でんしゃの なかで ねて しまった) — "I fell asleep on the train (without meaning to)." The thread is irreversibility: something is now finished and cannot be taken back. Whether that feels satisfying or regrettable depends on what the something is.

In speech てしまう contracts to ちゃう and でしまう to じゃう: 食べちゃった ("I ate it all / I ate it, oops"), 飲んじゃった, 読んじゃった, 忘れちゃった. These contractions are everywhere in casual conversation, drama and manga, and they are the reason learners who only studied the full form sometimes cannot parse ordinary spoken Japanese. Recognizing 〜ちゃった as past-tense てしまいました is a genuine listening unlock.

ておく comes from 置く (おく, to place) and means doing something now so it is ready later, or deliberately leaving a situation as it is. 旅行の前に切符を買っておきます (りょこうの まえに きっぷを かって おきます) — "I'll buy the tickets ahead of time." エアコンをつけておいてください (エアコンを つけて おいてください) — "Please leave the air conditioner on." The preparation sense is the more common one, and it is the natural way to talk about anything you do in advance: booking, checking, studying before class. Its casual contraction is 〜とく (and 〜どく after で): 買っとく, 読んどく, 調べとく.

8. Use 10: てあげる, てくれる, てもらう — favours have direction

Japanese does not have a neutral way to say "someone did something for someone else". You must choose a verb that encodes which way the favour flowed relative to you. This feels like extra work for a week and then becomes one of the most expressive things in the language.

Rows two and three describe an identical event from opposite ends of the telescope, and the particle is what tells them apart: てくれる takes が on the helper, てもらう takes に. Getting this pair fluent does more for natural-sounding Japanese than almost anything else at this level, and it is worth reviewing alongside the particles guide, because the が/に contrast here is the same machinery you meet everywhere else.

One social warning about てあげる. Announcing that you are doing someone a favour can sound condescending, especially upward. Saying 手伝ってあげましょうか to your boss is not wrong grammar but it is bad manners; the humble お手伝いしましょうか ("shall I assist?") is the correct move. Politer versions of the other two exist and are extremely common: てくださる (the honorific of てくれる) and ていただく (the humble of てもらう). 教えていただきました — "I was kindly taught (by someone senior)."

9. The mistakes learners actually make

• Building it from the ます-stem. ×読みて, ×書きて, ×待ちて. The te-form is built from the dictionary form, not from 読みます. Correct: 読んで, 書いて, 待って.
• Mistaking godan verbs that end in -eru/-iru for ichidan. 帰る (かえる, return), 入る (はいる, enter), 走る (はしる, run), 切る (きる, cut), 知る (しる, know) all look like ru-verbs and are not. Their te-forms are 帰って, 入って, 走って, 切って, 知って — never ×帰て. This handful is worth memorizing as a closed list, because they are all common words.
• ×行いて. 行く breaks the く rule: 行って. Drill it separately from 書いて and 聞いて so the exception does not contaminate the rule.
• Putting tense on the te-clause. The te-form never conjugates for tense. "I ate and slept" is 食べて寝ました, not ×食べました、寝ました strung together with て. One tense, at the end, governing everything.
• ×なくてください for negative requests. It is ないでください. 見ないでください — "Please don't look."
• ×知っていません. The negative of 知っています is 知りません. Positive takes ている; negative does not.
• Reading ている as always progressive. If the verb describes an instant change, ている is a state. 死んでいる means "is dead", not "is dying"; 来ています means "has come and is here"; 落ちている means "is lying there (having fallen)".
• Confusing なくて and ないで. Both are negative connectors, but ないで means "without doing" — 朝ご飯を食べないで学校に行きました ("I went to school without eating breakfast") — while なくて gives a reason or state: 分からなくて困りました ("I didn't understand and was stuck").

The most effective way to fix all of these at once is production practice, not reading. Take twenty verbs you already know from the N5 list and the N4 list, and convert each one to its te-form out loud, timing yourself. Then do it again with a pattern attached — 〜てください for all twenty, then 〜てもいいですか, then 〜てしまいました. Ten minutes a day for two weeks is usually enough to make the conversion automatic, and automatic is the goal: you cannot compose a sentence in real time if part of your attention is still computing whether 泳ぐ takes いて or いで. Running the same verb set through the study tool and keeping the stubborn ones in your review deck handles the spacing for you, and the group test in section 2 settles any verb you are unsure about.