Usually we use active voice and focus more on the person/thing who does the action (the doer or the subject). The subject comes first:
But sometimes we want to focus on the receiver or outcome of the action (the object). For this, we change to passive voice. The object comes first:
Sometimes, we don’t care about the subject (the doer) at all and completely omit them (leave them out):
How is the passive voice formed?
See ‘APPENDIX 4.3 – Active and Passive Voice’ tenses
Passive is used most often for: