Correct

不要紧 vs 没关系 vs 没什么 vs 没事儿(近义词)

/ Bùyàojǐn yus méiguānxi yus méishénme yus méishìr /
Strokes

Definition

of no importance,doesn't matter

Example

用法1
1)The four phrases all mean"to be of no importance".In the two examples below,any of the four can be used to mean the same:
2)To view from the structure,不要紧 can be split into 不大要紧,不怎么要紧,没关系 can be split into 没什么关系,没事儿 into 没什么事儿,but 没什么 can't be split.e.g:
1
Duìbu
对不起
  
,
ràng
jiǔděng
久等
le
  
yàojǐn
不要紧
  
(
  
/
méiguānxi
没关系
  
/
méishénme
没什么
  
/
méishìr  
没事儿
  
)

I'm sorry to keep you waiting a long time.It's all right.

2
Méiguānxi
没关系
  
(
  
/
yàojǐn
不要紧
  
/
méishénme
没什么
  
/
méishìr  
没事儿
  
)
  
,
qiè
一切
huì
hǎo
lai
起来
de
  

It doesn't matter,all will be 0K.

3
de
bìng
yàojǐn
要紧
  

His illness is not very serious.

用法2
1)不要紧 can be used in the subordinate clause to tell that sth.seems to be of no importance,but really does harm stated in the main clause):
2)In such cases,一 is often used in front of the verb to indicate an action to be followed by a result. 没关系 cannot be used in this way.
4
Zhè
tíngdiàn
停电
yàojǐn
不要紧
  
(
  
/
méishénme
没什么
  
)
  
,
bīngxiāng
冰箱
de
ròu
quán
biànzhì
变质
le
  

It looks all right to have a power cut,but all the meat in the refrigerator has gone bad.

5
Háizi
孩子
yàojǐn
不要紧
  
(
  
/
méishìr  
没事儿
  
)
  
,
de
wénzhāng
文章
xiě
xià
下去
le
  

The child's crying made him not be able to write on.

用法3
1)没关系 etc.can also be used as a response to another person's apology:
6
    
——
duìbu
对不起
  
,
cǎi
le
nín
de
jiǎo
  
  
méiguānxi
没关系
  
(
  
/
yàojǐn
不要紧
  
/
méishénme
没什么
  
/
méishìr  
没事儿
  
)
  

——I am sorry for stepping on your foot.——It doesn't matter.

7
    
——
rǎo
打扰
le
  
,
dānwu
耽误
xiūxi
休息
le
  
    
——
méiguānxi
没关系
  
(
  
/
yàojǐn
不要紧
  
/
méishénme
没什么
  
/
méishìr  
没事儿
  
)
  
,
qi
客气
  

——I am sorry for bothering you and holding you up.——It doesn't matter.Don't mention it.

用法4
1)没事儿 can also be used to mean"nothing serious":
8
    
——
chū
le
shénme
什么
wèn
问题
ma
  
?
    
——
méishìr  
没事儿
  

——Is there anything wrong?——It's OK.

9
    
——
de
bìng
zěnmeyàng
怎么样
  
?
    
——
méishìr  
没事儿
  
,
xiūxi
休息
tiān
jiù
huì
hǎo
  

——How about his illness?——Nothing serious.He will be OK after a few days's rest.