是不是

• He wondered if he had been dreaming .
  他不晓得自己是不是做了一场梦。
• They asked whether he was crossed in love .
  他们问他是不是情场失意。
• By the way , do you do your own laundry ?
  对了，你是不是自己洗衣服？
• Who knows but you may raise a dance .
  谁知道你们是不是组织一次舞会？
• Are you my boss, i'd like to know ?
  我倒想问问你，你是不是我的主人？
• Aren't you doing a bit for her ?
  你是不是想在她的身上捞到一点油水呀？
• Do we then turn our backs on technique ?
  那么，我们是不是摒弃技术呢？
• Oh, you're going to call me out, are you ?
  哦，你要跟我决斗是不是？
• Sorry , did i knock your elbow ?
  对不起，我是不是撞到你的胳膊肘了？
• As to the leakage, none could tell .
  至于是不是泄密了，谁也不知道。