As far as my knowledge is concerned, ... As far as my knowledge is concerned, the following ways are of great help to me. There is no doubt (that)子句 例：毫无疑问地，近视在我国的年轻人中是一个严重的问题。 There is no doubt that near-sightedness is a serious problem among the youth of our country. According to my personal experience, ... =Based on my personal experience, ... According to my personal experience, smile has done me a lot of good. It goes without saying that 子句 =(It is) needless to say (that)子句 =It is obvious that 子句 =Obviously, S. + V. It goes without saying that it pays to keep early hours. =There is no way of Ving. =There is no possibility of Ving. =It is out of the question to V. There is not denying that successful business lies in a healthy body and mind.