Double negation
Negation can be doubled in Mandarin Chinese to emphasize a negation with more emotional coloring. You can form a double negation using the following structures.
Patterns with the meaning "there's not one that doesn't/isn't…"
1) The structure 没有…不… 
This structure is used to form the following sentences:
"there isn’t a single boy who doesn't like football", "there isn’t a single student who isn’t afraid of failing an exam".
The above sentences have the following meanings: "all boys like football", "all students are afraid of failing their exams".
The subject is placed after 没有 and the predicate is placed after 不. An adverbial modifier of place can be placed before the structure.
This structure is used to form the following sentences:
"there isn’t a single boy who doesn't like football", "there isn’t a single student who isn’t afraid of failing an exam".
The above sentences have the following meanings: "all boys like football", "all students are afraid of failing their exams".
The subject is placed after 没有 and the predicate is placed after 不. An adverbial modifier of place can be placed before the structure.Scheme
没有
subject
不
predicate
Examples
没有孩子不喜欢玩儿
There aren’t any children who don’t like to have fun
méi yǒu háizi bù xǐhuan wánr
我们学校没有人不说汉语
There isn’t a single person in our school who doesn't speak Chinese
wǒmen xuéxiào méi yǒu rén bù shuō hànyǔ
2) The structure 没有不…的…
This structure is used to form the following sentence:
"There isn’t anything in his room that is not needed".
The meaning is the following: "all the things in his room are necessary".
The subject is placed before 没有不 and the predicate is placed between 没有不 and 的. The predicate can be expressed either by a verb or a verb phrase.
An adverbial modifier of place can be placed before the structure.
This structure is used to form the following sentence:
"There isn’t anything in his room that is not needed".
The meaning is the following: "all the things in his room are necessary".
The subject is placed before 没有不 and the predicate is placed between 没有不 and 的. The predicate can be expressed either by a verb or a verb phrase.
An adverbial modifier of place can be placed before the structure. Pay attention
A verb phrase is a combination of a verb and an auxiliary word. The auxiliary word can be either an auxiliary verb or an object.
Scheme
subject
没有不
predicate
的
Examples
我们家没有不喜欢唱歌的人
There isn’t anyone in our family who doesn't like to sing
wǒmen jiā méi yǒu bù xǐhuan chànggē de rén
我们没有不能解决的问题
There is no problem that we can't solve (we can solve all problems)
wǒmen méi yǒu bù néng jiějué de wèntí
The pattern with the meaning “there's not a single one, who/that doesn't…”
The structures 没有一…不…的 and 没有一…没…的 convey the meaning "there's not a single one, who/that doesn't…".
“一” can be followed either by a measure word+noun or only by just a measure word. 不 can be followed by a predicate expressed either by a verb or an adjective.
and 没有一…没…的 convey the meaning "there's not a single one, who/that doesn't…".
“一” can be followed either by a measure word+noun or only by just a measure word. 不 can be followed by a predicate expressed either by a verb or an adjective.Scheme
没有一
measure word
(subject)
不
verb/adjective
的
Examples
没有一个人不讨厌他的
Not a single person likes him
méi yǒu yí ge rén bù tǎoyàn tā de
这些菜没有一个不辣的
Among these dishes, there isn’t a single one that is not spicy
zhèxiē cài méi yǒu yí ge bú là de
The pattern with the meaning “it's not that...”
The structures 不是不 and 不是没 convey the meaning “it's not that...”.
It is placed before a predicate which is expressed either by a verb or an adjective.
and 不是没 convey the meaning “it's not that...”.
It is placed before a predicate which is expressed either by a verb or an adjective.Scheme
不是不/不是没
predicate
Examples
他不是没礼貌，就是害羞了
It's not that he wasn't polite, he was just shy
tā bú shì méi lǐmào, jiùshì hàixiū le
我不是不想说，我只是不知道你要不要知道
It's not that I don't want to talk about it, I just don't know if you want to know
wǒ bú shì bù xiǎng shuō, wǒ zhǐshì bù zhīdào nǐ yào bú yào zhīdào
The pattern with the meaning “cannot but…”
The structures 不…不… and 不…没… convey the meaning "cannot but…”.
The first negative adverb is followed by a modal verb. For example: 能 , 会 and 可能 .
The second negative adverb is followed by a verb
and 不…没… convey the meaning "cannot but…”.
The first negative adverb is followed by a modal verb. For example: 能 , 会 and 可能 .
The second negative adverb is followed by a verbScheme
不
modal verb
不/没
verb
Examples
老师不会不答应我们的请求
The teacher cannot refuse our request
lǎoshī bú huì bù dāyìng wǒmen de qǐngqiú
我们家不能没有你
Our family can't live without you
wǒmen jiā bù néng méi yǒu nǐ