have to must –

Modal auxiliary verbs should, ought, must

MUST AND HAVE TO - ESL worksheet by Rosario Pacheco

Modal Verbs of Obligation Must vs Have to worksheet

Modal Verbs of Obligation

English Modal Verbs: Must, Have to, Need to

English Grammar: Must and Have to, Mustn't and Don't Have to

I am not sure how to use the words can, could, may, might, should

71 MUST or HAVE TO (obligation) English ESL worksheets pdf …

MUST - MUSTN'T - HAVE TO - DON'T HAV…: English ESL worksheets pdf