Correct
必须 vs 必需
/ bìxū vs bìxū /
Strokes
Definition
必须 is an Auxiliary verb, 必需 is a Verb, which means [must; have to; essential; indispensable].
Example
必须 is an auxiliary verb used in front of the main verb, indicating the meaning of "must, ought to".
2)
3)必须 and the main verb can be used together as the attributive modifying the subject or object,e.g.:
1
Tōngguò
通过
hǎiguān
海关
shí
时
bìxū
必须
jiǎnchá
检查
hùzhào
护照
。
Passport is required to show at the Customs.
2
Dàjiā
大家
bìxū
必须
tuánjié
团结
hézuò
合作
,
gòngtóng
共同
kèfú
克服
kùnnan
困难
。
All of us should hang together to defeat difficulties.
If there is an adverbial, it must be placed before the main verb and after 必须.
3
Zhè
这
jiàn
件
shì
事
nǐ
你
bìxū
必须
qīnzì
亲自
pǎo
跑
yī
一
tàng
趟
。
As for the matter, you must go there in person.
4
Zhège
这个
wèntí
问题
wǒmen
我们
bìxū
必须
zài
再
zǐxì
仔细
yánjiū
研究
yī
一
xià
下
。
We must study it carefully again.
必须 and the main verb can be used together as the attributive modifying the subject or object.
5
Huánbǎo
环保
shì
是
měige
每个
rén
人
dōu
都
bìxū
必须
zuò
做
de
的
shì
事
。
Environmental protection is what everyone should do.
6
Zhè
这
shì
是
jǐ
几
ge
个
bìxū
必须
jìzhu
记住
de
的
shùzì
数字
。
These numbers must be memorized/born in mind.
必需 is a verb meaning indispensability and usually functions as an attributive.
7
Dànbáizhì
蛋白质
shì
是
réntǐ
人体
bìxū
必需
de
的
yíngyǎng
营养
。
Protein is vital to our body.
8
Tā
他
měiyuè
每月
bìxū
必需
de
的
shēnghuófèi
生活费
shì
是
800
800
yuán
元
。
His monthly living expen- ses are 800 yuan at least.
9
Mǐ
米
、
miàn
面
、
yóu
油
、
yán
盐
shì
是
rìcháng
日常
shēnghuó
生活
suǒ
所
bìxū
必需
de
的
。
Rice, flour, oil and salt are all daily necessities in life.