HSK V6
Correct

用得着

/ yòngdezháo / 
Strokes

Definition

to be able to use/useable/to have a use for sth/(in interrogative sentence) to be necessary to

Example

As a Verb

find sth useful; need

1
Zhè
这
hézi
盒子
méizhǔn
没准
huì
会
yòng
用
de
得
zháo
着
  
,
biè
别
rēngdiào
扔掉
  
。

Don't throw the box. It may come in handy/useful.

2
Nǐ
你
yìng
应
bǎ
把
nàxiē
那些
jiù
旧
píngzi
瓶子
liú
留
zhāo
着
  
,
shuōbudìng
说不定
nǎ
哪
tiān
天
huì
会
yòng
用
de
得
zháo
着
  
。

You should keep those old bottles—you never know when you might need them.

As a Verb

there is need to; it is necessary to

3
Yòng
用
de
得
zháo
着
zhème
这么
zǎojiù
早就
líkāi
离开
ma
吗
  
?

What's the necessity of leaving so early?