一、~the + ~est +名词+（that）+主词+ have ever + seen（known/heard/had/read，etc）
~the most +形容词+名词+（that）+主词+ have ever + seen（known/heard/had/read，etc）
例句：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
例句：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。）
例句：We cannot emphasize the importance of protecting our eyes too much.
四、There is no denying that + S + V……（不可否认的……）
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（全世界都知道……）
例句：It is universally acknowledged that trees are indispensable to us.