Obligation Modal Verbs

The following words are all classified as modal verbs expressing obligation. Their degree of obligation is different.

必须 / 必須 > 不得不 > 得 > 应该 > 要

Obligation level: strong weak (义务从强到弱)

必须 / 必須：must, need, should, have to

Strongest obligation

。

。

不得不：to have no choice but to (do something)

，。

，。

得(dĕi)：need; have to; ought

，。

，。

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