1) I fancy it has done you a lot of good not going. (正确)
I fancy it has done you a lot of good no going. (错误)
2) There is no denying the fact that he is diligent. (正确)
There is not denying the fact that he is diligent. (错误)
动名词的否定式是:“not+动名词”。
“There is no +动名词(短语)"是一种句型:
There is no doing sth. = It is impossible to do sth. = No one can do sth. = We can not do sth.