have no doubt 没错，毋庸置疑

　　doubt 表示疑心，疑惑，have no doubt 表示“没有疑心”。可以单独使用 I have no doubt, 也可以用 have no doubt that 主语+动词形态。

　　例句：

　　You're absolutely right. I have no doubt.

　　你说的没错，我深信不疑。

　　I have no doubt you'll do well.

　　你肯定做得很好。

　　I have no doubt that you're a good doctor.

　　我知道你是个出色的医生。

　　对话：

　　A: They have no doubt Sarah will become their manager.

　　他们确信莎拉会成为他们的经理。

　　B: Do they think she is a good person to work for?

　　他们觉得她适合做这份工作吗？