| Do you have to go now? | Yes, I have to leave immediately. |
| Do you have to get up early tomorrow morning? | Yes, I'll have to get up at six o'clock.(一般将来) |
| Did you have to take a taxi?(一般过去) | I'm afraid I had to. I couldn't get a bus. |
| Hasn't your friend arrived yet?(现在完成) | How long have you had to wait? I've had to wait for two hours! |
| Do you have to water the garden? | No. I don't need to water it now. It's going to rain. |
| Do we have to walk to the station? | No, we don't need to.We can catch a bus. |
