It must be realized that...
我们必须意识到...
All in all, we cannot live without... but at the same time we must try to find out new ways to cope with the problems that would arise.
总之，我们没有...是无法生活的。但同时，我们必须寻求新的解决办法来对付可能出现的新问题。
I sincerely believe that...
我真诚地相信...
It goes without saying that...
不言而喻，...
It can be said with certainty that...
可以肯定地说，...
As far as...is concerned, ...
就……而言，...
What's far more important is that...
更重要的是，...
We should take some effective measures.
我们应该采取有效措施。
We should try our best to overcome/conquer the difficulties.
我们应该尽努力去克服困难。
We should do our utmost in doing sth.
我们应该尽力去做……
We should solve the problems that we are confronted/faced with.
我们应该解决我们面临的困难。
Some changes have taken place in the past five years.
过去五年发生了很多变化。
Great changes will certainly be produced in the international communications.
在国际交流中理所当然会发生很多大的变化。
It has increased/decreased from…to…
他已经从…增加/减少到…
The output of July in this factory increased by 15%.
这个工厂7月份产量以增加了15%。
We cannot ignore the fact...
我们不能忽视这个事实。
I will conclude by saying...
最后我要说…...
What's wrong with sb./sth.？
某人/某物有什么问题？
How do you like...？
你觉得...怎么样？
What do you like about...？
你喜欢...的什么？
There+be+主语+地点状语/时间状语
例如：There's a boat in the river. 河里有条船。
What's wrong with your watch？
你的手表有什么毛病？
How cold it is today!
今天天气真冷!
What a fine picture!
多美的一幅画啊!
这些句型可以帮助你更准确地表达思想，使你的英语表达更加流畅和自然。建议你在写作和口语中多练习使用这些句型，以提高你的语言表达能力。