have to
auxiliary verb
us/ˈhæf·tu,ˈhæv-,-tə/present tensehasus/hæs,hæz/|past tense and past participlehad(alsohave got to,us/hævˈɡɑtˌtu,həv-,-tə/)(used with theinfinitiveformof anotherverb) to need to or beforcedto; must:
I have to go to Vermonttomorrow.