Introduction to Negative Forms
In Japanese, expressing negation is essential for everyday communication. Negative forms allow you to say that something is not true, did not happen, or will not happen. Unlike English, Japanese uses specific conjugation patterns for verbs, adjectives, and nouns to express negation.
We will explore how to form negative verbs, adjectives, and the negative copula, with examples to help you understand their usage.
Negative Verb Conjugation
To make verbs negative in their plain form, you generally replace the verb ending with its negative equivalent. For Group 1 (Godan) verbs, the final -u sound changes to its corresponding -a sound, then add ない. For Group 2 (Ichidan) verbs, simply remove る and add ない.
| Verb Type | Plain Form | Negative Form |
|---|---|---|
| Godan (う-verbs) | 書く (kaku) – to write | 書かない (kakanai) – do not write |
| Ichidan (る-verbs) | 食べる (taberu) – to eat | 食べない (tabenai) – do not eat |
私は手紙を書かない。
Watashi wa tegami o kakanai.
I do not write letters.
彼は肉を食べない。
Kare wa niku o tabenai.
He does not eat meat.
Negative Forms of Adjectives
Japanese adjectives are divided into two main types: い-adjectives and な-adjectives. Their negative forms are created differently.
For い-adjectives, replace the final い with くない. For な-adjectives, add じゃない after the adjective stem.
| Adjective Type | Positive | Negative |
|---|---|---|
| い-Adjective | 高い (takai) – high/expensive | 高くない (takakunai) – not high/not expensive |
| な-Adjective | 静か (shizuka) – quiet | 静かじゃない (shizuka janai) – not quiet |
この部屋は広くない。
Kono heya wa hirokunai.
This room is not spacious.
彼女は親切じゃない。
Kanojo wa shinsetsu janai.
She is not kind.
Polite Negative Forms
To express negation politely, conjugate verbs into their ます form and then add ません. This applies to both Godan and Ichidan verbs. Similarly, adjectives use polite negative forms by adding くないです or じゃないです.
| Form | Example | Meaning |
|---|---|---|
| Verb Polite Negative | 書きません (kakimasen) | do not write |
| い-Adjective Polite Negative | 高くないです (takakunai desu) | is not expensive |
| な-Adjective Polite Negative | 静かじゃないです (shizuka janai desu) | is not quiet |
私は手紙を書きません。
Watashi wa tegami o kakimasen.
I do not write letters.
この本は高くないです。
Kono hon wa takakunai desu.
This book is not expensive.
Negative of です and だ
The copula です (polite) and だ (plain) are used to link nouns and adjectives to the subject. Their negative forms are ではありません (polite) and じゃない or ではない (plain).
Note that じゃない is a contraction of ではない and is commonly used in casual speech.
| Form | Example | Meaning |
|---|---|---|
| Polite Negative | 学生ではありません (gakusei dewa arimasen) | is not a student |
| Plain Negative | 学生じゃない (gakusei janai) | is not a student |
彼は先生ではありません。
Kare wa sensei dewa arimasen.
He is not a teacher.
私は学生じゃない。
Watashi wa gakusei janai.
I am not a student.
Negating Nouns with じゃない
When negating nouns in casual speech, the phrase じゃない is commonly added after the noun. This form is very versatile and used frequently in everyday conversation.
これはペンじゃない。
Kore wa pen janai.
This is not a pen.
彼女は日本人じゃない。
Kanojo wa nihonjin janai.
She is not Japanese.
Practice Examples
Try to identify the negative forms in these sentences and translate them.
犬は好きじゃない。
Inu wa suki janai.
I do not like dogs.
彼は昨日学校に行かなかった。
Kare wa kinō gakkō ni ikanakatta.
He did not go to school yesterday.
部屋がきれいじゃないです。
Heya ga kirei janai desu.
The room is not clean.
Answers:
- 好きじゃない – “do not like”
- 行かなかった – past negative of 行く (to go)
- きれいじゃないです – polite negative of な-adjective
Tips for Remembering Rules
- Memorize verb groups (Godan vs Ichidan) to conjugate negatives correctly.
- For verbs, remember the “-a” sound change + ない for Godan verbs.
- Adjective negatives: い-adjectives replace い with くない, while な-adjectives add じゃない.
- Use polite negative forms (ません, じゃないです) to sound more formal and respectful.
- じゃない is casual and very common for negating nouns and adjectives.