Допоміжне дієслово: had (форми дієслова to have)

Головне дієслово: V3

Позитивне: Суб'єкт + had + V3 + ...

I had walked the dog.She had studied math.

Негативне: Суб'єкт + had + not + V3 + ...

I hadn't walked the dog.She hadn't studied math.

Запитання: Had + суб'єкт + V3 + ... ?

Had you walked the dog?Had she studied math?

Відкрите запитання: Запитальна частина + had + суб'єкт + V3+ ... ?

Where had you walked the dog?Why had she studied math?