вы когда-нибудь видели, чтобы

have you ever seen

→ вы
phrase Rare #43,917
have you ever seen Used to ask whether someone has ever witnessed an action happening, often followed by a person and an action in the past tense.
RU: Вы когда-нибудь видели, чтобы кошка так быстро бегала?
EN: Have you ever seen a cat run that fast?