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Japanese verb確か (tashika) Conjugation
確か (tashika) means “sure, certain, positive”. It is a な-adjective verb. It is a な-adjective: it takes な before a noun (確かな) and だ or です after it, so 確かだ, 確かでした, 確かに. 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
- sure, certain, positive
- Type
- な-adjective
- Dictionary form
- 確か
- Reading
- たしか
- Romaji
- tashika
- Negative
- 確かじゃない
- Past
- 確かだった
- Te-form
- 確かで
- Adverb
- 確かに
Basic forms
Present現在形・辞書形
| Plain | 確かだ |
|---|---|
| Plain negative | 確かじゃない / 確かではない |
| Polite | 確かです |
| Polite negative | 確かじゃありません / 確かではありません |
Past過去形・た形
| Plain | 確かだった |
|---|---|
| Plain negative | 確かじゃなかった / 確かではなかった |
| Polite | 確かでした |
| Polite negative | 確かじゃありませんでした / 確かではありませんでした |
Te-formて形
| Plain | 確かで |
|---|---|
| Plain negative | 確かじゃなくて / 確かではなくて |
Can and if
Conditional (-ba)仮定形・ば
| Plain | 確かなら |
|---|---|
| Plain negative | 確かでなければ |
Conditional (-tara)たら
| Plain | 確かだったら |
|---|---|
| Plain negative | 確かじゃなかったら / 確かではなかったら |
Adjectives
Adverb (adjectives)連用形
| Adverb | 確かに |
|---|
More common Japanese verbs and adjectives
- 名誉 (meiyo)honor, honour, credit
- 明確 (meikaku)clear, precise, definite
- 問う (tou)to ask, to inquire
- 有効 (yuukou)valid, effective
- 有力 (yuuryoku)influential, prominent, leading
- 選ぶ (erabu)to choose, to select, to pick
- 活発 (kappatsu)lively, active, vigorous
- 基本的 (kihonteki)fundamental, basic
- 急 (kyuu)sudden, abrupt, unexpected
- 急速 (kyuusoku)rapid
- 現金 (genkin)mercenary, self-interested, calculating
- 公的 (kouteki)public, official
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 確か (tashika) 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.