Auxiliary verb

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Also known as "modal verbs"

Express capability, possibility, necessity, obligation or willingness.

Potential articles / sections

  • In sentences with an auxiliary verb, the auxiliary verb is negated, not the main verb.
  • To respond to questions with an auxiliary verb, the auxiliary verb is used, not the main verb. E.g. 你想不想来? 想.
  • Auxiliary verbs can't be reduplicated.
  • Aspect particles 了, 着, 过 can't be used with auxiliary verbs.
  • Auxiliary verbs must take a verb as an object, not a noun.
  • Most important auxiliary verbs:
    • 应该
    • 必须
    • 得 (děi)

Sources