| Subject | have to / has to | base form of verb |
| I You We They |
have to | wear a uniform. get up early on Sundays. study hard. |
| He She |
has to |
| Subject | don't / doesn't have to | base form of verb |
| I You We They |
don't have to | wear a uniform. get up early on Sundays. study hard! |
| He She |
doesn't have to |
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