〜わけがない

there is no way that ...; it's impossible that ...

1. Overview

This expression is commonly used to dismiss or reject a claim, suggesting that it is unreasonable or illogical. It indicates a strong conviction that something cannot be true or cannot happen.

2. Structure

• Verb (plain form) + わけがない
• Noun + なわけがない
• い-Adjective (base form) + わけがない
• な-Adjective + なわけがない

3. Usage Explanation

1. Expressing Impossibility: "〜わけがない" is often used when someone believes that a situation cannot occur or that an assertion is false.

   • Example: 彼がそんなことをするわけがない。
     (There is no way he would do something like that.)

2. Dismissing Claims: It can be used to reject someone’s suggestion or assumption by emphasizing the lack of reasonableness.

   • Example: あの問題を一人で解決するわけがない。
     (There’s no way I can solve that problem by myself.)

3. Emphasizing Certainty: This structure expresses a high level of certainty about a statement or situation being false or impossible.

   • Example: 彼女がそんなに早く来るわけがない。
     (There’s no way she would come that quickly.)

4. Example Sentences

1. 彼がそんなに簡単に成功するわけがない。
   (There’s no way he could succeed that easily.)

2. あの映画がそんなに面白いわけがない。
   (There’s no way that movie is that interesting.)

3. 私が彼に負けるわけがない。
   (There’s no way I can lose to him.)

4. こんな時間に電話をかけるわけがない。
   (There’s no way I would call at this hour.)

5. Important Points

1. "〜わけがない" emphasizes the speaker's strong disbelief or certainty about the impossibility of a situation.
2. It is a formal and somewhat strong expression, often used in serious contexts.

6. Similar Grammar

• 〜わけではない: This structure can also be used to negate a statement, but it implies that there may be exceptions or nuances.
  • Example: 私が嫌いなわけではない。
    (It’s not that I dislike it.)

7. Alternative Grammar

• 〜はずがない: This expression also conveys disbelief or impossibility, similar in meaning to "〜わけがない."
  • Example: 彼がそのことを知っているはずがない。
    (There’s no way he knows about that.)

8. Summary

"〜わけがない" is used to express disbelief or the impossibility of a situation. It strongly emphasizes the speaker's conviction that something cannot be true or happen. This expression is commonly used in both spoken and written Japanese to refute claims or express certainty about a statement's validity.