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JLPT N4 · Guessing & hearsay

はずがない (hazu ga nai)

~はずがない — “there's no way ~”

In short · はずがない is the negative of はず: the speaker strongly believes that something cannot possibly be true. It uses the same connections as はずだ.
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Pattern

  • 動詞・い形容詞の普通形 + はずがない つく → つくはずがない / 間違える → 間違えるはずがない
  • 名詞+の/な形容詞+な + はずがない 本物のはずがない / 簡単なはずがない

Where it comes from

It replaces the だ of はずだ with がない, literally “there is no reason for it to be so.” The result is a strong negative guess. You can also say はずはない.

When to use it

Use it when you cannot believe what someone says or when you want to rule something out on solid grounds: 彼がうそをつくはずがありません. The polite form is はずがありません.

Things to watch

It is very firm and can sound rude to someone who has just given their opinion. It also differs slightly from ~ないはずだ (“should not ~”): はずがない denies the very possibility.

Examples

  • 彼(かれ)がうそをつくはずがありません。

    Kare ga uso o tsuku hazu ga arimasen.

    There's no way he would lie.

  • こんなに簡単(かんたん)な問題(もんだい)を間違(まちが)えるはずがない。

    Konna ni kantan na mondai o machigaeru hazu ga nai.

    There's no way I'd get such an easy question wrong.

  • やさしい友(とも)だちが、そんなことを言(い)うはずがない。

    Yasashii tomodachi ga, sonna koto o iu hazu ga nai.

    There's no way such a kind friend would say something like that.

Common mistakes

  • Nouns take の and na-adjectives take な: 本物のはずがない, 簡単なはずがない.
  • It is not for denying your own will. 行かないはずがない means “there is no way he would not go.”

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