hazu ga nai はずがない

Phrase meaning: cannot (do), it is impossible that...

1. After dictionary form of verb/adjective
そんなにお金が儲かるはずがない。
Sonna ni o-kane ga moukaru hazu ga nai.
It is impossible that one would make such much money.

2. After ta-form of verb/adjective
彼がミスをしたはずがない。
Kare ga misu o shita hazu ga nai.
He cannot have made a mistake.

3. After nai-form of verb/adjective
彼女がまだ来ていないはずがない。
Kanojo ga mada kite inai hazu ga nai.
It is impossible that she has not arrived yet. (She should have already arrived.)

4. After adjectival noun + na/no
彼の話がうそのはずがない。
Kare no hanashi ga uso no hazu ga nai.
His story cannot be false.
-> See also: hazu desu