It goes without saying that子句
(It is)needless to say(that)子句
It is obvious that子句
It goes without saying that it pays to keep early hours.
There is no Ving.
There is no way of Ving.
There is no possibility of Ving.
It is impossible to V.
It is out of the question to V.
No one can V.
We cannot V.
There is not denying that successful business lies in a healthy body mind.
I am greatly convinced(that)子句
I am greatly assured(that)子句
I am greatly convinced that prevention is better than cure.
Among various kinds of…
Of all the…
Among various kinds of sports，I like jogging in particular.
It can be easily proved(that)子句
It can be easily proved that nothing is more precious than time.
…cannot be overemphasized.
The importance of traffic safety cannot be overemphasized.
In my opinion…
To my mind…
As far as I am concerned…
I am of the opinion that子句
In my opinion，playing video games not only takes much time but is also harmful to health.