my grammar book says that among others, we can use the adverbials 'yesterday', 'at midnight' and 'in 1994' also in past perfect sentences. Actually, I cant imagine similar sentences might work, I would probably use the past simple in such.
Can we thus say something like:
A/ I hadnt finished the report at midnight. /personally, I would say by midnight/
In fact, I cant even think of any examples for yesterday and in 1994.
Would you provide me with some, please, maybe giving some explanation?
Thanks for your efforts.