could have died

• • 笑得要死：

    When he put on the wig and false moustache I could have died.

    他戴上假发和假胡须时，真把我笑坏了。

  • 窘得要命：

    When he started telling everybody about the time I fell down in the middle of the love scene in the school play, I could have died.

    当他告诉大家说，我在学校里演出的那场爱情剧中摔了一跤时，我真窘得要命。