ask for a favour

Translations
попросить об услуге
She asked him for a favour to help with the project.
Она попросила его об услуге помочь с проектом.
Definitions
To request assistance or help from someone, typically in a manner that implies the request is not obligatory and may require the other person to go out of their way to accommodate.
Words
ask

verb
просить
for

preposition
о
a

article or possessive pronoun
неопределённый артикль
favour

noun
услуга