A black car was bought yesterday.

[Karen123456]

A black car was bought yesterday by my father.

A black car was bought by my father yesterday.

The above sentences are written by my daughter.

Are both sentences correct?

Thanks.

 

[DonnyB]

Yes: in those sentences it doesn't matter which way round you put "by my father" and "yesterday".

 

[PaulQ]

A black car was bought yesterday by my father.

A black car was bought by my father yesterday.

I will add that although the sentences are grammatically correct,
(a) they are not idiomatic. The passive sounds very strange. The indicative would be natural.
(b) time phrases are normally the final element of the sentence.

 

[Karen123456]

I will add that although the sentences are grammatically correct,
(a) they are not idiomatic. The passive sounds very strange. The indicative would be natural.
(b) time phrases are normally the final element of the sentence.

 

[Karen123456]

Thanks, Donny and Paul.