I am learning English and I have got a question about past perfect tense. In textbooks it is said that this tense is used to describe a sequence of events, to emphasise that one event happened before another.
But I faced out a sentence which uses past perfect tense without the sequence. The sentence is: 'The traffic sign had been replaced'. There is no following event here. Why was not it said: 'The traffic sign was replaced'?
As I understand, such construction is used to show an emotion, like 'Oh my gosh, they have finally done it'
Am I correct?
And how often the PP tense is used in such a way?