Japanese grammar
What does ~わけがない mean? Japanese grammar N3
~わけがない means there is no way that ~; impossible that ~ (emphatic denial of possibility).
| Level (estimated, JLPT framework) | N3 |
|---|---|
| Structure | 普通形 + わけがない Aな + な + わけがない N + の + わけがない |
| Romaji | wakeganai |
| Meaning | there is no way that ~; impossible that ~ (emphatic denial of possibility) |
Forming it
| Noun | 本物 + の + わけがない |
|---|---|
| Verb | 知っている + わけがない |
| na-adjective | 簡単な + わけがない |
How to use it
The speaker strongly asserts that something is IMPOSSIBLE to be true or to happen, based on common sense or obvious knowledge.
- 「~わけがない」 strongly asserts that something CANNOT POSSIBLY be true or happen, based on reasoning or common sense. Stronger than 「~はずがない」.
- The speaker is nearly certain, usually with obvious evidence.
- Different from 「~はずがない」: both deny a possibility, but 「わけがない」 is more assertive and emotional; 「はずがない」 relies on reasoning and is more objective.
Examples
まじめな彼が、そんなうそをつくわけがない。
There’s no way someone as serious as him would tell such a lie.
一日でこの仕事が全部終わるわけがない。
There’s no way all this work can be finished in a single day.
足をけがしているのだから、彼が試合に勝てるわけがない。
With an injured leg, there is no way he can win the match.
Keep in mind
- In casual speech, this is often shortened to 「わけない」.
- な-adjectives connect with 「な」, nouns connect with 「の」.
Common mistakes
-
Wrong彼が先生だわけがない。
There's no way he's a teacher.
Correct彼が先生のわけがない。
A noun connects to 「わけがない」 with 「の」 (or である), not 「だ」.
-
Wrong彼がそんなことを言うわけではない。
There's no way he'd say something like that.
Correct彼がそんなことを言うわけがない。
"There's no way he'd say" uses 「わけがない」; 「わけではない」 means "not necessarily" (completely different).
-
Wrong彼が来ないわけがないと思うが、少し心配だ。
It's not that he definitely won't come, but I'm still a bit worried.
Correct彼が来ないわけではないが、少し心配だ。
"Not necessarily not…" is 「わけではない」; 「わけがない」 is a flat denial.
-
Wrong簡単わけがない。
There's no way it's that simple.
Correct簡単なわけがない。
A na-adjective connects through 「な」.
Exam tips
- 「わけがない」 = there's no way (assertive); don't confuse it with 「わけではない」 (not necessarily).