понятия не имел

had no idea

→ понятие
phrase Rare #32,537
had no idea Used to say someone did not know something at all. Masculine singular past tense form; common in casual speech.
RU: Я понятия не имел, что ты уже приехал.
EN: I had no idea you had already arrived.

Том понятия не имел, чего ожидать.

Tom had no idea what to expect.

Том понятия не имел, где Мэри.

Tom had no idea where Mary was.

Никто понятия не имел, кто я.

Nobody had any idea who I was.

Том понятия не имел, о чём говорит.

Tom had no idea what he was talking about.

Том понятия не имел, кто такая Мэри.

Tom had no idea who Mary was.