一、 the + ~ est + 名词 + (that) + 主词 + haveever + seen ( known/heard/had/read, etc)
the most + 形容词 + 名词 + (that) + 主词 + have ever + seen ( known/heard/had/read, etc)
Helen is the most beautiful girl that I have ever seen.
Mr. Chang is the kindest teacher that I have ever had.
二、Nothing is + ~~~ er than to + V Nothing is + more + 形容词 + than to + V
Nothing is more important than to receive education.
三、~~~ cannot emphasize the importance of ~~~ too much.（再怎么强调...的重要性也不为过。）
We cannot emphasize the importance of protecting our eyes too much.
四、There is no denying that + S + V ...（不可否认的...）
There is no denying that the qualities of our living have gone from bad to worse.
五、It is universally acknowledged that + 句子~~ （全世界都知道...）
It is universally acknowledged that trees are indispensable to us.
六、There is no doubt that + 句子~~ （毫无疑问的...）
There is no doubt that our educational system leaves something to be desired.
七、An advantage of ~~~ is that + 句子 （...的优点是...）
An advantage of using the solar energy is that it won't create (produce) any pollution.
八、The reason why + 句子 ~~~ is that + 句子 （...的原因是...）
The reason why we have to grow trees is that they can provide us with fresh air./ The reason why we have to grow trees is that they can supply fresh air for us.
九、So + 形容词 + be + 主词 + that + 句子 （如此...以致于...）
So precious is time that we can't afford to waste it.