If there's one verb form to learn well, it's the て-form. By itself it means almost nothing — it carries no tense and finishes no sentence. That's exactly why it's everywhere: it's the joint Japanese uses to hook a verb onto whatever comes next, whether that's a request, an ongoing action, permission, a rule, or simply the next thing that happens. Learn how to make it and a huge slice of everyday grammar opens up at once. The good news: it's built with the very same sound-changes as the plain past tense — if you know 飲んだ, you already know 飲んで.
The て-form is a connecting form. Think of it as ending a clause on a comma rather than a full stop: "having done X, …" or just "do X, and …". Because it doesn't lock in a tense or a level of politeness on its own, the words that follow it decide what the whole sentence means.
So this one form is the launchpad for a long list of patterns. First, how to build it.
Sort the verb into its group first, exactly as for every other form. る-verbs and the two irregulars are trivial; う-verbs use the onbin sound-changes.
| Type | Rule | Example |
|---|---|---|
| る-verb | drop る, add て | 食べる → 食べて 見る → 見て |
| irregular | learn them | する → して 来る → 来て (kite) |
For う-verbs, the ending fuses with て and shifts sound. It's the identical table as the plain past — just swap た→て and だ→で:
| Ending | becomes | Example | (cf. past) |
|---|---|---|---|
| …う / つ / る | …って | 買う → 買って 待つ → 待って 帰る → 帰って | 買った |
| …む / ぶ / ぬ | …んで | 飲む → 飲んで 遊ぶ → 遊んで 死ぬ → 死んで | 飲んだ |
| …く | …いて | 書く → 書いて | 書いた |
| …ぐ | …いで | 泳ぐ → 泳いで | 泳いだ |
| …す | …して | 話す → 話して | 話した |
The one exception: 行く (iku, "to go") looks like a …く verb but goes 行って (not 行いて) — matching its past 行った. It's the single common verb that breaks the く → いて rule, so burn it in early.
The て-form isn't only for verbs — it's how you chain adjectives together ("cheap and tasty"). The two adjective types behave differently, as always:
| Type | Rule | Example |
|---|---|---|
| い-adjective | drop い, add くて | 安い → 安くて 高い → 高くて |
| な-adjective | add で | 静か → 静かで 便利 → 便利で |
| noun + です | add で | 学生 → 学生で |
So 安くておいしい = "cheap and tasty," and 静かできれいな部屋 = "a quiet and pretty room." The irregular いい follows its usual habit of conjugating from よ: いい → よくて, never いくて.
Here's the payoff. Each of these is just the て-form plus a small tail — learn the form once and all of them come almost for free.
The polite "please do …". Add ください to the て-form:
Add いる for the progressive ("is ‑ing") and for resulting states ("is married," "is open"). In casual speech the い often drops to てる:
Use て to chain "do this, then that." Only the final verb shows the tense and politeness — every earlier verb sits in plain て-form:
"May / it's OK to …". Add もいい(です); with か it asks permission:
"Must not …". Add はいけない / はいけません (casual ちゃだめ):
Every tail is kana. The bits that do all the work here — て, で, って, んで, ください, いる — are pure hiragana hooked onto a stem. The faster you read those tails, the faster the pattern jumps out at you. The kana typing game flashes a character and asks for its romaji against the clock, drilling exactly that reading reflex into a combo chase.
Next steps: see where it comes from in verbs & conjugation, chain it with the right markers on the particles page, or join descriptions with adjectives.