I have to do homework today., We don't have to go to the shopping center., You must take this medicine., Do you have to do sports?, You must not take this medicine with food., Do you have to go to the party?, He must help his mom at home., She does not have to phone her grandma., My sister doesn't have to pick the tomatoes., I have to go to the supermarket with my mom.,

Have to - doesn't have to - must - must not

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