modality N3 uncommon casualpolitewritten
〜はずはない — cannot be / surely not ~
〜はずはない ・ はずはない
Builds on 〜はず
A full written guide for 〜はずはない is on the way.
This point is mapped in the grammar tree, but its examples, formation table and usage notes haven't been written yet. The fastest way to learn it now is to meet it in real sentences inside Jengo.
See 〜はずはない in real sentences
Jengo shows 〜はずはない the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled with reference to A Dictionary of Intermediate Japanese Grammar. Editorial confidence: medium.