have to / don't have to

have to + בסיס = חייבים, בדרך כלל בגלל חוק, כלל או נסיבות.

• I have to wear a uniform at work.
• She has to get up early tomorrow.
• We had to wait for an hour. (עבר)

don't have to = לא חייבים (אבל מותר):

• You don't have to pay. It's free.
• He doesn't have to work on Fridays.

must או have to? שניהם "חייבים". must נשמע יותר כמו החלטה של הדובר (I must call my mother), ו-have to כמו כלל מבחוץ. בעבר יש רק had to.‎

שימו לב: mustn't ו-don't have to לא אותו דבר.

• You mustn't smoke here. = אסור.
• You don't have to come. = לא חובה, אפשר לבחור.