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Japanese verb役に立つ (yakunitatsu) Conjugation
役に立つ (yakunitatsu) means “to be helpful, to be useful”. It is a う-verb (godan) verb. It is an う-verb (godan): the last sound changes, 役に立たない and 役に立ちます, and the te-form is 役に立って. Below is its conjugation in all 14 forms, plain and polite, the same forms the Japanese verb conjugation worksheets print in their answer keys.
- Meaning
- to be helpful, to be useful
- Type
- う-verb (godan)
- Dictionary form
- 役に立つ
- Reading
- やくにたつ
- Romaji
- yakunitatsu
- Masu form
- 役に立ちます
- Nai form
- 役に立たない
- Te-form
- 役に立って
- Ta form
- 役に立った
Basic forms
Present現在形・辞書形
| Plain | 役に立つ |
|---|---|
| Plain negative | 役に立たない |
| Polite | 役に立ちます |
| Polite negative | 役に立ちません |
Past過去形・た形
| Plain | 役に立った |
|---|---|
| Plain negative | 役に立たなかった |
| Polite | 役に立ちました |
| Polite negative | 役に立ちませんでした |
Te-formて形
| Plain | 役に立って |
|---|---|
| Plain negative | 役に立たないで |
Progressive (-te iru)ている
| Plain | 役に立っている |
|---|---|
| Plain negative | 役に立っていない |
| Polite | 役に立っています |
| Polite negative | 役に立っていません |
Wanting, inviting, telling
Want to (-tai)たい形
| Plain | 役に立ちたい |
|---|---|
| Plain negative | 役に立ちたくない |
| Polite | 役に立ちたいです |
| Polite negative | 役に立ちたくないです |
Volitional意向形
| Plain | 役に立とう |
|---|---|
| Polite | 役に立ちましょう |
Imperative and requests命令形
| Plain command | 役に立て |
|---|---|
| Plain negative (don't) | 役に立つな |
| Polite request (-te kudasai) | 役に立ってください |
| Polite negative (-naide kudasai) | 役に立たないでください |
Can and if
Potential可能形
| Plain | 役に立てる |
|---|---|
| Plain negative | 役に立てない |
| Polite | 役に立てます |
| Polite negative | 役に立てません |
Conditional (-ba)仮定形・ば
| Plain | 役に立てば |
|---|---|
| Plain negative | 役に立たなければ |
Conditional (-tara)たら
| Plain | 役に立ったら |
|---|---|
| Plain negative | 役に立たなかったら |
Passive and causative
Passive受身形
| Plain | 役に立たれる |
|---|---|
| Plain negative | 役に立たれない |
| Polite | 役に立たれます |
| Polite negative | 役に立たれません |
Causative使役形
| Plain | 役に立たせる |
|---|---|
| Plain negative | 役に立たせない |
| Polite | 役に立たせます |
| Polite negative | 役に立たせません |
Causative passive使役受身形
| Plain | 役に立たされる |
|---|---|
| Plain negative | 役に立たされない |
| Polite | 役に立たされます |
| Polite negative | 役に立たされません |
More common Japanese verbs and adjectives
- 踏ん張る (funbaru)to brace one's legs
- 悲しむ (kanashimu)to be sad, to mourn for, to regret
- 飛び交う (tobikau)to fly about, to flutter about, to flit about
- 沸かす (wakasu)to boil, to heat, to prepare
- 暴れる (abareru)to act violently, to rage, to struggle
- 戻す (modosu)to put back, to return, to give back
- 預かる (azukaru)to look after, to take care of, to keep
- 揺さぶる (yusaburu)to shake, to jolt, to rock
- 立ち寄る (tachiyoru)to drop by, to stop by, to drop in
- 締め出す (shimedasu)to shut out, to bar, to lock out
- 乗り換える (norikaeru)to transfer, to change
- 計る (hakaru)to measure, to weigh, to survey
About these tables
The forms are built from Wiktionary's conjugation tables, and they are the ones the Japanese verb conjugation worksheet generator prints, so a chart or answer key made there matches this page. That page explains how the forms were checked.
Print this verb chart opens 役に立つ (yakunitatsu) on the worksheet preview with every form filled in, ready to print on A4 or US Letter or save as PDF. To practice it with other verbs and adjectives, the generator also makes blank conjugation boxes and quick quizzes with answer keys. To practice online instead, the Japanese verb conjugation quiz marks each form as you type it.
Verbs, adjectives and their meanings come from JMdict, the property of the Electronic Dictionary Research and Development Group, used in conformance with the Group's licence. The forms are built by the standard rules, with the irregular ones written out.