Structures of past tense passive forms

Past passive tenses

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.

Past passive forms – common mistakes
Common mistakes Correct version Why?
This problem solved last week. This problem was solved last week. To make a past passive form we use was/were + past participle of the verb.
This problem was solve last week. This problem was solved last week. To make a past passive form we use was/were + past participle of the verb.
My car was repairing at that time. My car was being repaired at that time. To make a past passive form of a continuous tense we use was/were + being + past participle of the verb.
She has already be invited. She has already been invited. To make a passive form of the perfect tense we use have/has/had + been + past participle of the verb.