一、~~~ the + ~ est + 名词 + + 主词 + have ever + seen
~~~ the most + 形容词 + 名词 + + 主词 + have ever + seen
例句：Helen is the most beautiful girl that I have ever seen.
二、Nothing is + ~~~ er than to + V Nothing is + more + 形容词 + than to + V
例句：Nothing is more important than to receive education.
三、~~~ cannot emphasize the importance of ~~~ too much.
例句：We cannot emphasize the importance of protecting our eyes too much.
四、There is no denying that + S + V ...
例句：There is no denying that the qualities of our living have gone from bad to worse.
五、It is universally acknowledged that + 句子~~
例句：It is universally acknowledged that trees are indispensable to us.
六、There is no doubt that + 句子~~
例句：There is no doubt that our educational system leaves something to be desired.
七、An advantage of ~~~ is that + 句子
