●To begin with, we must attach the greatest importance possible to this issue/fact (key word).
●As is well known to all, it is now high time that we took this (topic word) into serious consideration.
I think …
He does it.
He will take it
Because he is very much determined, he will carry it out this time. (原因)
比较：He is very much determined. He will carry it out this time.
The weather being fine, a large number of people went sightseeing.
比较：The weather is fine. A large number of people went sightseeing.
Africa is the second largest continent, its size being about three times that of China.
比较：Africa is the second largest continent. Its size is about three times that of China.
To be or not to be, that is a question. (莎士比亚)
To study or not to study, that is much different.(引申)
To do it well, you must plan it well.
比较：You want to do it well. And you must plan it well.
Only when we fully recognize its importance can we have control of its essence.
比较：After we fully recognize its importance, we can have control of its essence.
No sooner had he arrived home than it began to rain.
比较：He arrived home. And it began to rain.
whether or not he will come is still unknown to all the people present.
比较：No one present knows whether he will come or not.
That he has done it all by himself is known to everyone.
比较：Everyone knows that he has done it all by himself.
●As a creature, every one knows.
●Actions speak louder than words.
●Practice makes perfect.