1、开头句型:As far as ...is concerned 就……而言
It goes without saying that...不言而喻,...
It can be said with certainty that...可以肯定地说......
As the proverb says,正如谚语所说的,
It has to be noticed that...它必须注意到,...
2、衔接句型:A case in point is ...一个典型的例子是...
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As is often the case...由于通常情况下...
As stated in the previous paragraph 如前段所述
But it's a pity that...但遗憾的是…
3、结尾句型:I will conclude by saying...最后我要说…
Therefore, we have the reason to believe that...因此,我们有理由相信…
Therefore, in my opinion, it's more advisable...因此,在我看来,更可取的是…