Difference Between “Have To” and Must” “Have to” and “must” are very similar in meaning and can often times be used interchangeably. You can say: “She must go to the store” and “She has to go to the store.” The meanings here are the same. As such, many people use them in this way with no distinction. There are some differences
Lesson idea: must, mustn't, don't have to… – ELT Planning
Agile and Waterfall Change Management Process
MUST vs HAVE TO infographic
have to, don't have to, must, mustn't - Test-English
MUST and HAVE TO difference / A free guide post
Modals of obligation
Difference Between Should and Must with Examples
Does “have to” mean the same as the modal auxiliary “must”?
Modal verbs: Should, Ought to, Have to and Must
Should Or Must! — Quotidian — 415
The Difference Between Must, Have to, Shall, Need and May
Learn English Should vs. Need to vs. Have to vs. Ought to vs
Must vs Have to in English Using MUST in English We use must to