Sentence Correction

3)Object v/s. Subject: If a noun is the object of a verb, the verb should end with ‘ed’. If a noun is the subject of a verb, the verb should end with ‘ing’. (e.g. ‘local times determined’ when the noun is object of the verb ‘determined’) (e.g. determining the local times – where the noun local times is the subject of the verb determining). Somebody determined times – times is object of determined
Times differed – Times is the subject of differed

Please explain the above topic from sahil's notes.