Explanation
Expresses a strong denial or refusal: 'I would never...', 'No way I would...'.
Formation
Verb (masu stem) + やしない
Detailed explanation
This grammar adds a nuance of strong denial or dismissal of the idea that the speaker (or someone) would do the action. Formed by adding やしない to the verb's stem, it often appears in casual or spoken language.
Examples
こんな時に泣きやしない。
Konna toki ni naki-yashinai.
I would never cry at a time like this.
私が彼を助けやしない。
Watashi ga kare o tasuke-yashinai.
There's no way I'd help him.
彼がそんなことを言いやしない。
Kare ga sonna koto o ii-yashinai.
He would never say such a thing.
私がそんな高価なものを買いやしない。
Watashi ga sonna kouka na mono o kai-yashinai.
There's no way I'd buy something so expensive.
Practice
Grammar content sourced from hanabira.org.