Objective pronon

Hi,

English is not my first language, so very often grammatical structures of my native tongue interfere with my usage of English. I've got the problem with objective and possessive pronouns preceding the "-ing" forms. I often wonder, with some sort of confusion, which pronoun - possessive or objective one - should be used in patterns: pronoun + -ing form. And I think along this line: when the "-ing" form undoubtedly represents a verbal noun (gerund) then I should use the possessive pronoun, for example: We are not used to his being away, but if it is a participle which has the notion of action then I should use the objective pronoun, for example: His popularity prevents him being seen as one of our great satirists. [From The Guardian.]

Am I right?

Thank you.