一、no more than 与 not more than
1. no more than 的意思是“仅仅”“只有”“最多不超过”，强调少。如：
This test takes no more than thirty minutes. 这个测验只要30分钟。
The pub was no more than half full. 该酒吧的上座率最多不超过五成。
For thirty years， he had done no more than he (had) needed to. 30年来，他只干了他需要干的工作。
2. not more than 为 more than (多于)的否定式，其意为“不多于”“不超过”。如：
Not more than 10 guests came to her birthday party. 来参加她的生日宴会的客人不超过十人。
比较：She has no more than three hats. 她只有3顶帽子。(太少了)
She has not more than three hats. 她至多有3顶帽子。(也许不到3顶帽子)
I have no more than five yuan in my pocket. 我口袋里的钱最多不过5元。(言其少)
I have not more than five yuan in my pocket. 我口袋里的钱不多于5元。(也许不到5元)
二、no more……than 与 not more……than
1. no more……than 表示对两者都否定，意为“同……一样不”(=neither……nor……)。如：
He is no more a writer than a painter. 他既不是画家，也不是作家。(=He is neither a painter nor a writer.)
He‘s no more able to read Spanish than I am. 他和我都读不懂西班牙语。(=Neither he nor I am able to read Spanish.)
I know no more Spanish than I know Greek. 我对西班牙语和希腊语同样都不懂。(=I know neither Spanish nor Greek.)
2. not more……than 指两者都具有某种特征，但是程度不同，意为“不如”“不及”(= not so…… as)。如：
She is not more clever than he is. 她不如他聪明。(=She is not so clever as he is.)
This book is not more difficult than that one. 这本书不及那本书难。(This book is not so difficult as that one.)
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