Structure
Verb[る](1) + わけがない
[な]Adjective + な + わけがない
[い]Adjective + わけがない
(1) Verb[た]
Details
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Standard
使用域
一般
About わけがない
One of the strongest ways to use the noun わけ in Japanese, is in the expression わけがない. This is regularly translated as 'there is no way that (A)', or 'it is impossible that (A)'. However, as mentioned in other わけ lessons, わけ is used very similarly to 'so' in English, so may also be thought of as 'it is SO not (A)', with 'so' being used for emphasis. In this structure, わけ is combined with the case marking particle が, and the い-Adjective ない.
わけがない may be used with verbs, or adjectives in their attributive form.
わけがない may be used with verbs, or adjectives in their attributive form.
- このステーキ2キロもあるの?!こんなの一人で食べれるわけがない!This steak weighs 2kg?! I SO can't eat something like this alone!
- キムラシェフが作ったパスタだよ、不味い訳がないじゃん!This pasta is made by Chef Kimura, there is no way this would taste bad!
- このアパートは線路の隣にあるから静かなわけがない。This apartment is next to the train track, so there is no way it is quiet.
Caution
Compared to わけではない, わけがない is much stronger, and emphasizes the 'non-existence' of something. This can be thought of as similar to the difference between 'it is so that it isn't (A)' (for わけではない), and 'it is SO not (A)' (for わけがない).- 彼はいつも遊んでいるが、暇なわけではない。He is always going out, but it is not necessarily so that he has a lot of free time.
- 彼はいつも仕事をしているから、暇なわけがない。Since he is always working, he SO does not have any free time.
Synonyms
ことはない
There is no need to, Never happens
Not studied yet
はずがない
Hardly possible, Cannot be, Highly unlikely, Improbable
Not studied yet
わけではない
It doesn't mean that, It is not the case, It's not like
Not studied yet
ようがない・ようもない
There's no way to, It's impossible to
Not studied yet
そうもない
Very unlikely to, Does not seem that, Does not appear that
Not studied yet
Examples
日本人ならそんなことを言うわけがない。
There is no way that a Japanese person would say that.
手を繋いでいるので、子供が勝手にどこかに行くわけがない。
I am holding my kid's hand, so there is no way that he would just run off somewhere.
日本にいるだけで、日本語を学べるわけがない。
There is no way you can learn Japanese from just being in Japan.
あれだけ着込んだら寒いわけがない。
There is no reason why you would feel cold, wearing all those extra clothes.
彼が嘘をつくわけがない。
There is no way he would lie.
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わけではない vs. わけがない
Maggie Sensei
Very thorough breakdown in Japanese
nihongo day by day
接続・意味・使い方・例文
にほんごの里
Offline
Tae Kim's Japanese Grammar Guide
Page 285
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わけがない – Grammar Discussion
Most Recent Replies (7 in total)
Anthropos888
Here another example from the JLPT 2 exam:
暑い地方でも、泥と草で太陽光線を避ける家を作れば、激しくなるという _____。
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わけがない
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わけにはいかない
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わけだ
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わけではない
When I see all the different わけ together my brain just shuts off
So except for 3) the other answers wouldn’t make any sense at all?
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blacktide
I see the following note on this grammar point:
わけがない can be replaced with はずがない, but not always the other way around
Would it be that はずがない doesn’t denote the same level of impossiblility as わけがない? Like はずがない is very unlikely but not impossible, whereas わけがない is certainly impossible?
Daru
Exactly! Its all about level of certainty/possibility.
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