Passives | LearnEnglish
https://learnenglish.britishcouncil.org/.../passives06.01.2021 · We use the passive voice to change the focus of the sentence. We often use the passive: when we prefer not to mention who or what does the action (for example, it's not known, it's obvious or we don't want to say) so that we can start a sentence with the most important or most logical information.