Réponse :

The convict is sentenced by the court to deportation.

The convict was sentenced by the court to deportation.

A piece of bread was stolen by Elizabeth.

Jane's child was taken away by the justice.

Jane is considered as a 'bad woman' by people.

Jane was considered as a 'bad woman' by people.

The immigrants are inspected by the Australian immigration services.

The immigrants were inspected by the Australian immigration services.

Explications :

Voix passive : verbe BE + participe passé

Dans ces phrases, le COD devient donc sujet, tandis que le sujet devient complément d'agent avec "by".