Question

have to和must的区别是什么？

Answer 1

1. 在肯定句中，用法相似，表示“你认为必须或应当做某事”
I haven’t spoken to Lily for a long time. I must / have to phone her.
We must / have to wear sunglasses when you go out in summer.
It’s getting late. I must / have to go.
这里的重点是说话人“认为”。
2. 当我们想要表达某人不得不做某事，说话者并不是在表达自己的观点时，使用have to 而不用must
I have to finish my homework by 8pm.
I have to work from 9 to 6 every day.
Paul has to travel a lot for his work.
3. 但在书面规定和规则中，一般用must
Applications for the course must be received by July 25.
You must write your answers on the answer sheet.
4. must没有时态的变化，所以讨论过去和将来的事时，have to用途更广泛
We didn’t have much time. We had to hurry. (这里不说We must hurry).