Meaning
~わけがない/わけはない is used to strongly deny that something is possible or to assert that something must logically be true. It indicates there is no reason or way for something to happen, emphasizing absolute negation. The pattern ~ないわけはない specifically expresses confident certainty that something must have happened or be true.
Formation
| Part of speech | Formation |
|---|---|
| 动词普通形 | わけがない／わけはない |
| い形容词 | わけがない／わけはない |
| な形容词 な | わけがない／わけはない |
| 名词 の | わけがない／わけはない |
Examples
-
今月うちの会社はいくつかのプロジェクトを同時に始めたから、暇なわけがない。
Since our company started several projects simultaneously this month, there's no way we can be free/idle. -
不動産屋が紹介してくれた物件は駅に近いし、広いので、安いわけがない。
The real estate agent showed us a property near the station and spacious, so it's impossible for it to be cheap. -
あの登山家は高い山が好きだから、富士山に登ったことがないわけはないよ。
That mountaineer loves high mountains, so there's no way he hasn't climbed Mt. Fuji.
Summary
- Use to express logical impossibility or strong negation of a situation
- Can attach to verbs, i-adjectives, na-adjectives (with な), and nouns (with の)
- The form ~ないわけはない reverses the pattern to confidently assert something must be true; use only when certain