大学英语四级语法部分虽不单独设题，但贯穿于听、读、写、译各题型中。扎实的语法基础，是达成全方位突破的首要条件。新东方在线整理了2025下半年英语四级语法讲义：否定，供各位考生参考。
2025下半年英语四级语法讲义：否定
全部否定和部分否定
eg. All the birds can not fly.
Not all the birds can fly. 不是所有些鸟都会飞。
1. 部分否定
eg. All the birds can not fly. 并不是所有些鸟都会飞。
None of the birds can fly. 所有些鸟都不会飞。
代词或副词如all, both,every,everybody, every day, everyone, everything, everywhere等与not搭配用时，表示部分否定，意思为“并不是都是"等。
eg. All is not gold that glitters. 发光的并不是都是金子。= Not all is gold that glitters.
2. 全部否定
英语中常用not, none, nobody, nothing, nowhere, neither, never等表示全部否定的定义。
eg. Nothing in the world is difficult for one who sets his mind to it. 世上无难事，只怕有心人。
eg. W: Daddy, I ve decided to give up science and go to business school.
M: Well, it is your choice as long as pay your own way, but I should warn you that not everyone with a business degree will make a successful manager.
Q: What do we learn from the conversation?
A. The man doesnt have money for his daughters graduate studies.
B. The man doesnt think his daughter will get a business degree.
C. The man insists that his daughter should pursue her studies in science.
D. The man advises his daughter to think carefully before making her decision.
双重否定
1.在阅读当中出现的频率更高中一年级些。在一个句子中出现两个否定词：not, never, hardly, scarcely, rarely, seldom, few, little, none等，双重否定表示一定的定义。
eg. No one can command others who cannot command himself.
A perpson can command others who command himself. 正人先正己。
eg. Without the ability to think critically, to defend their ideas and understand the ideas of others, they can not fully participate in our democracy.
假如没能力进行批判性思维，维护我们的看法，并理解别人的看法，他们就不可以充分的参与大家的民主政治中来。
2.形式否定，意义一定
eg. A man can never have too many ties. 一个男性可以拥有不少的领带。
A woman can never have too many dresses. 一个女性拥有再多的衣服也不为过。
eg. We can hardly praise his achievement too much. 对他的收获大家无论如何赞扬也不过分。
eg. A mother can never be patient enough with her child. 一个妈妈对她的孩子再如何耐心也不为过。
A teacher can never be strict enough with his students. 一个老师对他的学生再如何严格也不为过。
这种形式主要运用于阅读当中。
以上就是新东方在线大学英语四级频道为大伙收拾的“2025下半年英语四级语法讲义：否定”，期望大伙可以更好的学会大学英语四级语法攻略，提升大学英语四级水平。
