Upper-intermediate grammar exercise: past passive tenses

English grammar practice exercise, upper-intermediate / advanced level.

This exercise focuses on the past passive tenses.

Instructions: change the sentences below into the correct passive tense.

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Structures of past tense passive forms
past simple passive I was told about it yesterday.
present perfect passive He's (he has) been fired from the company.
past perfect passive I'd (I had) been given the money by a friend.
past continuous passive The room was being decorated.