Examlpe of Modal Verbs of Necessity
Hello! "Must" is for personal obligation (you feel it's necessary).
"Have to" is for external obligation (someone else or rules require it. Like rules, schedules, or other people).
Both are correct, but the choice depends on whether the obligation feels personal or imposed by external factors.
In your sentence:
"I ___ finish my homework before I can go out."
- If the sentence reflects something you personally feel is necessary, then "must" would work:
"I must finish my homework before I can go out." - If it's more about external pressure (like a rule or something someone else requires), then "have to" would be correct:
"I have to finish my homework before I can go out."
Hope that helps!