have to

modal verb

1. 必须；不得不
   used to show that you must do sth
   1. Sorry, I've got to go.
      对不起，我必须走了。
   2. Did she have to pay a fine?
      她非得交罚款吗？
   3. You don't have to knock─just walk in.
      不必敲门——进来就是了。
   4. I haven't got to leave till seven.
      我可以等到七点钟才离开。
   5. First, you have to think logically about your fears.
      首先，你得对你担忧的理由好好地想想。
   6. I have to admit , the idea of marriage scares me.
      我不得不承认，一想到结婚我就害怕。
   7. Do you have to go?
      你非得走吗？
   8. Have you got to go?
      你非得走吗？
2. （劝告或建议时用）
   used to give advice or recommend sth
   1. You simply have to get a new job.
      你就是得找份新工作。
   2. You've got to try this recipe─it's delicious.
      你得试试这种烹调法——味道很不错。
3. （表示一定真实或肯定发生）
   used to say that sth must be true or must happen
   1. There has to be a reason for his strange behaviour.
      他的古怪行为一定事出有因。
   2. This war has got to end soon.
      这场战争必将很快结束。
4. （用以暗示麻烦的事或某人有意捣蛋）
   used to suggest that an annoying event happens in order to annoy you, or that sb does sth in order to annoy you
   1. Of course, it had to start raining as soon as we got to the beach.
      可恶的雨，我们一到海滩它就非得下起来。
   2. Do you have to hum so loudly? (= it is annoying)
      你非得用这么大嗓门哼唱不可吗？

1. If they do close the local college I'll have to go to Worcester.
   如果他们真把本地的大学关闭了，我就得去伍斯特上大学了。
2. The world will be different, and we will have to be prepared to adapt to the change
   世界会变得不同，我们必须做好准备以适应其变化。
3. You and I are going to have to agree to disagree then.
   那你我只能各自保留不同意见了。
4. I ain't got kids, but I have to pay towards the schools.
   我没有孩子，但是我必须向学校交钱。
5. We all have to stay alert
   我们大家都必须保持警惕。
6. You have to carry a bleeper so that they can call you in at any time.
   你要随身带着寻呼机，以便他们随时呼你。
7. I have to go and cook the dinner
   我得去做饭了。
8. You have to demonstrate that you are reliable
   你得证明自己是靠得住的。
9. You have to admit that you are, in fact, in difficulties
   你不得不承认，你事实上是陷入了困境。
10. I enumerate the work that will have to be done.
    我列举了必须得做的一些工作。
11. We have to lie and hide the fact that I have an illness
    我们不得不撒谎来隐瞒我有病这个事实。
12. He has to apply for a permit and we have to find him a job
    他得申请一个许可证，而我们得给他找份工作。
13. I'll have to fly.
    我得赶紧走了。
14. We have to prove how gritty we are.
    我们必须证明我们有多么勇敢无畏。
15. Credit cards can be handy — they mean you do not have to carry large sums of cash.
    信用卡很方便，有了它你就不用携带大量现金了。
16. You have to be careful what you say on telly
    在电视上说话时你必须很谨慎。
17. All you have to do is make a home video.
    你要做的就是拍一段家庭录像片。
18. The weather will be the biggest hurdle so I have to be ready.
    天气将会是最大的障碍，所以我必须要作好准备。
19. Look. The train's in. We'll have to run for it now.
    看，火车进站了，我们现在得赶紧朝那边跑了。
20. You have to understand how cells interact
    你必须明白细胞是怎样相互作用的。
21. I felt sure I'd have to kiss my dancing career goodbye.
    我明确感觉到我将不得不与我的舞蹈生涯说再见了。
22. You have to learn to face your problem
    你要学会面对自己的问题。
23. If we have to litigate, we will.
    迫不得已的话，我们会提起诉讼。
24. I have to say this, Madam Chairman.
    主席夫人，我不得不这么说。
25. I have to leave. Nice to have met you.
    我得走了。认识您很高兴。
26. Why must you do everything as if you have to win?
    你为什么做每件事情都跟你非要赢似的？
27. I have to go, I really must, at once
    我得走了，我真的必须马上就走。
28. We have to resolve this matter once and for all
    我们必须彻底解决这一问题。
29. I told him I'd have to think about that one.
    我告诉他那个问题我必须考虑一下。
30. When I was nine or ten someone explained to me that when you are grown up you have to work
    我大概9岁或10岁的时候，有人跟我说人长大了就得工作。

  oblige have to must【导航词义：必须】

  oblige v. 〈正式〉非做…不可，迫使

〔辨析〕指因法律、义务、形势等关系而不得不做某事，通常用被动语态。

  have to modal v. 必须，不得不

〔辨析〕指客观情况迫使某人做某事，侧重于客观上的“必须”。

  must modal v. 必须

〔辨析〕指因需要、命令或强制而必得做某事，侧重于主观上的“必须”。