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have to (EN)
動詞

動詞 “have to”

不定詞 have to; 三単現 has to; 過去形 had to; 過去分詞 had to; 動名詞 having to
  1. しなければならない
    I have to finish my homework before I can go out to play.
  2. ~に違いない (結論として他に考えられない場合)
    She has to be the teacher because she's holding all the textbooks.