have to - 意思，英文例子

动词 “have to”

 不定式 have to; 三单 has to; 过式 had to; 过分 had to; 动名 having to

必须
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I have to finish my homework before I can go out to play.
只能 (指逻辑上或可能性上的必然结论)
She has to be the teacher because she's holding all the textbooks.