HSK V7-9
Correct

非得

/ fēiděi / 
Strokes

Definition

(followed by a verb phrase, then – optionally – 不可, or 不行 etc) must

Example

As an Adverb

must; have to

1
Xuéhǎo
学好
wàiyǔ
外语
fēiděi
非得
xiàgōngfu
下功夫
bùxíng
不行
  
。

The mastery of a foreign language calls for painstaking efforts.

2
Fēiděi
非得
mǎshàng
马上
jiějué
解决

have to be solved immediately