非得 fēiděi must
(followed by a verb phrase, then - optionally - 不可, or 不行 etc) must
How to remember 非得: 非 not + 得 get = must.
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How it is used
- Must / simply have to - expresses insistence or necessity - 你非得去吗？ (nǐ fēiděi qù ma?) do you really have to go?
- Usually paired with a trailing 不可/不行/才行: 非得完成不可 (absolutely must finish).
- Colloquial and emphatic; conveys 'there's no way around it', sometimes with a note of exasperation.