Nos.

例句：

1. 1. No one can deny the importance of education.
   没有人能否认教育的重要性。
2. 2. There is no need to worry about the weather forecast.
   没有必要担心天气预报。
3. 3. The answer is not in the book;it is in your own mind.
   答案不在书里，而在你自己的心里。