がそんなことをしたはずがない

there's no way [someone] did such a thing

→ が

phrase Rare #41,671

there's no way [someone] did such a thing Expresses strong disbelief or certainty that someone did not do something. The person before が is the subject, and そんなこと means “such a thing.”

JA: 彼がそんなことをしたはずがない。

EN: There's no way he did such a thing.

彼女がそんなことをしたはずがない。

She couldn't have done such a thing.

彼がそんなことをしたはずがない。

He couldn't possibly have done such a thing.

マイクがそんなことをしたはずがない。

Mike couldn't have done such a thing.

その女の子がそんなことをしたはずがない。

That girl couldn't have done such a thing.