√ После till/until/before/as soon as/the moment.
√ После after/when.
√ Со словами hardly / scarcely… when/ No sooner…than.
|I had walked.||I had not walked.||Had I walked?|
|He had walked.
She had walked.
It had walked.
|He had not walked.
She had not walked.
It had not walked.
|Had he walked?
Had she walked?
Had it walked?
|We had walked.
You had walked.
They had walked.
|We had not walked.
You had not walked.
They had not walked.
|Had we walked?
Had you walked?
Had they walked?
1) Действие совершилось раньше другого
Past Perfect употребляется, когда одно действие совершилось раньше другого:
When Ilia came to his summer house, Olga and her friends had gone home already.
They had been the soldiers for two years before I met them
The old oak trees, which had stood in the park for 200 years before the park was build
2) После till/until/before/as soon as/the moment.
Till/until/before/as soon as/the moment/immediately + had worked + Past simple.
Показывает, чтобы подчеркнуть действие, которое совершилось или предполагалось, что совершилось раньше другого действие.
My family didn"t want to go anywhere till our cousin had phoned them.
Before he showed up we had done some shopping.
3) После after/when обычно следует Past Perfect:
After he had presented his speech we started to ask him some questions.
After/when she had done Vialetta showed up.
4) Со словами hardly / scarcely… when/ No sooner…than.
Hardly / scarcely… when
The concert had hardly started when the singers showed up at the stage.
Если предложение начинается: hardly/scarcely …when идете, инверсия вспомогательный глагол ставится пред главным существительным (как в вопросительном предложении)
Before-перед тем как