“Have to” ve “has to” ifadeleri, zorunluluk veya mecburiyet anlatmak için kullanılır. “Have to” genellikle birinci ve ikinci tekil şahıs ile çoğul şahıslar için (I, we, you, they), “has to” ise üçüncü tekil şahıs için (he, she, it) kullanılır. İşte bazı cümle örnekleri:
1. I have to finish my homework before I can go out.
2. You have to wear a helmet when you ride a motorcycle.
3. They have to get their approval before launching the project.
4. She has to water the plants every day.
5. He has to submit the report by Friday.
6. It has to be done by tomorrow.
7. We have to meet early to prepare for the presentation.