HSK 3 HSK V2
Correct

必须

/ bì xū /
Strokes

Definition

必须 is an Adverb, which means “compulsory; necessarily”.

1. It expresses a reasonable requirement. 

2. It intensifies the imperative mood. 

Example

必须 as a Adverb.
1
Zuò
huǒchē
火车
chūxíng
出行
de
huà
  
,
liúxuéshēng
留学生
必须
yào
dài
zhào
护照
xuéshengzhèng
学生证
  

International students must bring their passports and student ID cards when travelling by train.

2
Kāichē
开车
de
shíhou
时候
  
,
men
我们
必须
hǎo
ānquándài
安全带
  

When driving, we must fasten our seat belts.

3
Xuéhǎo
学好
hàn
汉语
bìng
shì
jiàn
róng
容易
de
shì
  
,
必须
yào
xià
pān
gōng
苦功夫
  

Learning Chinese well is not an easy task, and it must be a hard work.

4
rén
客人
必须
zài
zhōng
中午
shíèr
十二
diǎn
qián
以前
bàn
办理
tuìfáng
退房
shǒu
手续
  

Guests must check out by noon.