Wrong "be" form for the tense
The cake is baked yesterday.
The cake was baked yesterday.
"Yesterday" signals past → use was/were.
Missing "been" in perfect forms
The file has sent already.
The file has been sent already.
Present perfect passive = has/have + been + p.p.
Past simple instead of past participle
The door was broke by the wind.
The door was broken by the wind.
"Broke" = simple past active. Passive needs the p.p.: broken.
Missing "being" in continuous passive
The bridge is repaired at the moment.
The bridge is being repaired at the moment.
Present continuous passive = is/are + being + p.p.
Using "been" in future passive
The winners will been announced soon.
The winners will be announced soon.
Future passive = will + be (not "been") + p.p.
Intransitive verbs cannot be passive
The accident was happened on the highway.
The accident happened on the highway.
Verbs like happen, arrive, die, sleep have no object — no passive possible.