have toauxiliary verb
us/ˈhæf·tu, ˈhæv-, -tə/present tense has /hæs, hæz/, past tense and past participle had also have got to, /hævˈɡɑtˌtu, həv-, -tə/(used with the infinitive form of another verb) to need to or be forced to; must:
I have to go to Vermont tomorrow.