The pattern
"I have to" plus a verb says something is necessary: a rule, a duty, a fact of your life. "I have to work on Saturday" means the schedule decided, not you. It is the everyday word for obligation; "must" exists, but in American conversation people say "have to" almost every time.
The negative changes meaning more than learners expect. "I don't have to" means it is not necessary, you are free. It does not mean it is forbidden. "I don't have to work Saturday" is good news. For "forbidden" you need "can't" or "mustn't".
Say it out loud
Tap a sentence to hear it. Say it after the voice.
"I have to admit" and "I have to say" introduce an honest opinion, often a compliment.
"Don't have to" means it is optional, not that it is forbidden.
Check yourself
Practice · 3 min
Say what is required. Prompt on the left, one natural sentence on the right.
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Say it today
Use it once in a real conversation before tomorrow. Out loud counts, even to yourself.