fail to do sth
fixed phr..fixed phr.. to not do something that you were expected or supposed to do.
fixed phr.. to neglect or omit the performance of an expected action; often used to describe a lack of success in meeting a requirement or obligation.
He failed to do his homework on time.
The company failed to do the necessary safety checks before the factory opened.
Despite numerous warnings from the local authorities, the developer failed to do the required environmental impact assessment.
usually followed by an infinitive verb to specify the action that did not happen.
contrast with 'forget to do' (accidental) and 'refuse to do' (intentional); 'fail to do' is more neutral and focuses on the result of the action not occurring.
He failed doing his homework.He failed to do his homework.the verb 'fail' must be followed by a 'to-infinitive' rather than a gerund when expressing an omission of action.