1 I have to be at the office at 9:00. (v)
2 We don't have to wear a uniform at school. (X)
3 He doesn't have to work on Saturdays. (X)
4 He has to speak English at work. (✓)
1 I have to be at the office at 9:00. (v)
2 We don't have to wear a uniform at school. (X)
3 He doesn't have to work on Saturdays. (X)
4 He has to speak English at work. (✓)