have to

动词 v.
中文释义

英文释义

动词 v.
  1. Must; need to; to be urged to; to be required to; indicates obligation.
    — You have to wear a seat belt.
  2. Must; expresses a logical conclusion.
    — that has to be the postman; it has to be an electrical fault

词形变化

has to present,singular,third-person having to participle,present had to participle,past had to past hafta alternative,colloquial

词源

Dates back at least to the Old English habban + tō construction, with the same meaning as sense 1 below.
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