Writing in the active voice makes the meaning clear while keeping sentences from becoming complicated and wordy. Sentences using passive voice are not necessarily wrong, just less effective than ...

Use your current topic — that is, what you are writing about — as the grammatical subject of your sentence (see Verbs: Choosing between active and passive voice ... has many rules in English ...

We refer to a sentence as being in the "active voice" when the subject is performing the action of the sentence (the verb). A sentence is in the "passive voice" when the subject is being acted upon by ...