Correct

大晴天下雹子

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/大晴天下雹子-Chinese-idioms-Cchatty-de86cfd3-ee76-491a-9a63-b0e602935006-1612776848.jpg

Collocation

1
实在是大晴天下雹子
2
却/然而大晴天下雹子
3
大晴天下雹子的事情
4
真是大晴天下雹子

Definition

大晴天下雹子

Literally means:

hail under a sunny day

Actually means:

a bolt from the blue; something bad happens suddenly

Literally this phrase means that it suddenly hails on a sunny day.

It figuratively refers to the sudden outbreak of unfortunate things, especially disasters. It often suggests the unexpected occurrence of something bad.

大晴天却突然下起了雹子。

比喻不好的事情,特别是灾祸突然发生。多指发生了不好的事。

Example

Used as predicate, object, attributive or as a minor sentence. (作谓语、宾语、定语,也可以在句中做小句)
1
Zǎoshang
早上
gāng
lǐng
de
gōng
工资
  
,
què
zài
huíjiā
回家
de
shang
路上
bèi
rén
tōu
le
  
,
zhēnshi
真是
qíngtiān
晴天
xià
báozi
雹子
  

I just got my salary in the morning, but I was stolen on my way home.

2
Suīrán
虽然
qíngtiān
晴天
xià
báozi
雹子
de
shì
shì
hěn
nán
liào
预料
de
  
,
dànshì
但是
zhǐyào
只要
píngshí
平时
zuòhǎo
做好
zhǒng
各种
zhǔnbèi
准备
  
,
可以
大大
jiǎnshǎo
减少
sǔnshī
损失
  

Although it is difficult to predict the things of the mule in sunny days, but as long as you usually make all kinds of preparations, you can also greatly reduce the loss.

3
qíngtiān
晴天
xià
báozi
雹子
  
,
yóu
由于
jīn
资金
chū
le
wèn
问题
  
,
jīng
已经
tán
hǎo
de
zuò
合作
xiàng
项目
bèi
被迫
xiāo
取消
le
  

On a sunny day, the cooperation project that had been discussed was cancelled because of a problem with the funds.