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have to (EN)
verb

verb “have to”

infinitive have to; he has to; past tense had to; past part. had to; ger. having to
  1. indicates that someone is obliged or required to do something
    I have to finish my homework before I can go out to play.
  2. suggests that something is the only logical or possible conclusion
    She has to be the teacher because she's holding all the textbooks.