Have you seen my credit card?
クレジットカード見なかった?
Have you seen the Greek Art Exhibition?
ギリシャ美術展を見ましたか(◆現在まだ開催中の場合)
Have you seen today's paper?
今日の新聞を読んだ?
Have you worked out how much it will cost?
いくらかかるか考えてみましたか
have youth on one's side
若さという武器がある
Haven't you read this book already?
その本(当然)もうお読みですよね(◆疑問文におけるalreadyは肯定の答えを期待;⇒yet 副2)
Having been in the wars, his car was ready for the junkyard.
彼の車は乱暴に扱われてきたのでスクラップ寸前だった