если бы я знал, что

if I had known that

→ если

phrase Rare #49,445

if I had known that Used to introduce a hypothetical past condition, often followed by what the speaker would have done. «Знал» is the masculine form; a female speaker would say «знала».

RU: Если бы я знал, что ты устал, я бы не звал тебя гулять.

EN: If I had known that you were tired, I wouldn’t have asked you to go out.

Если бы я знал, что Том в больнице, я бы его навестил.

If I had known that Tom was in the hospital, I would have visited him.

Если бы я знал, что Том в Бостоне, то постарался б его навестить.

If I had known Tom was in Boston, I would have tried to visit him.

Если бы я знал, что ты там, я бы сразу пришел.

If I had known you were there, I would have come straight away.