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Japanese verb積む (tsumu) Conjugation
積む (tsumu) means “to pile up, to stack”. It is a う-verb (godan) verb. It is an う-verb (godan): the last sound changes, 積まない and 積みます, and the te-form is 積んで. 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 pile up, to stack
- Type
- う-verb (godan)
- Dictionary form
- 積む
- Reading
- つむ
- Romaji
- tsumu
- Masu form
- 積みます
- Nai form
- 積まない
- Te-form
- 積んで
- Ta form
- 積んだ
Basic forms
Present現在形・辞書形
| Plain | 積む |
|---|---|
| Plain negative | 積まない |
| Polite | 積みます |
| Polite negative | 積みません |
Past過去形・た形
| Plain | 積んだ |
|---|---|
| Plain negative | 積まなかった |
| Polite | 積みました |
| Polite negative | 積みませんでした |
Te-formて形
| Plain | 積んで |
|---|---|
| Plain negative | 積まないで |
Progressive (-te iru)ている
| Plain | 積んでいる |
|---|---|
| Plain negative | 積んでいない |
| Polite | 積んでいます |
| Polite negative | 積んでいません |
Wanting, inviting, telling
Want to (-tai)たい形
| Plain | 積みたい |
|---|---|
| Plain negative | 積みたくない |
| Polite | 積みたいです |
| Polite negative | 積みたくないです |
Volitional意向形
| Plain | 積もう |
|---|---|
| Polite | 積みましょう |
Imperative and requests命令形
| Plain command | 積め |
|---|---|
| Plain negative (don't) | 積むな |
| Polite request (-te kudasai) | 積んでください |
| Polite negative (-naide kudasai) | 積まないでください |
Can and if
Potential可能形
| Plain | 積める |
|---|---|
| Plain negative | 積めない |
| Polite | 積めます |
| Polite negative | 積めません |
Conditional (-ba)仮定形・ば
| Plain | 積めば |
|---|---|
| Plain negative | 積まなければ |
Conditional (-tara)たら
| Plain | 積んだら |
|---|---|
| Plain negative | 積まなかったら |
Passive and causative
Passive受身形
| Plain | 積まれる |
|---|---|
| Plain negative | 積まれない |
| Polite | 積まれます |
| Polite negative | 積まれません |
Causative使役形
| Plain | 積ませる |
|---|---|
| Plain negative | 積ませない |
| Polite | 積ませます |
| Polite negative | 積ませません |
Causative passive使役受身形
| Plain | 積まされる |
|---|---|
| Plain negative | 積まされない |
| Polite | 積まされます |
| Polite negative | 積まされません |
More common Japanese verbs and adjectives
- 指し示す (sashishimesu)to indicate, to show, to point to
- 次ぐ (tsugu)to follow, to come after, to come next
- 受ける (ukeru)to receive, to get
- 出迎える (demukaeru)to meet, to greet
- 上る (noboru)to ascend, to go up, to climb
- 深まる (fukamaru)to deepen, to heighten, to intensify
- すばらしい (subarashii)wonderful, splendid, magnificent
- 組む (kumu)to cross, to link
- 知り合う (shiriau)to get to know each other, to make acquaintance
- 燃える (moeru)to burn, to get fired up
- 売り出す (uridasu)to put on the market
- 舞う (mau)to dance
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 積む (tsumu) 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.