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重庆大学版（必修）英语2一年级《Theme A Learning to Be Relationship Between Friends Unit 1 Friends and Friendship Grammar》优秀教学课件
B: Because it is broken.
Read the following dialogues and try to understand what the coloured words mean.
3) A: The flight to New York should be leaving in a few minutes.
B: Are you sure?
4) A: Sally, you should be careful when you go out at night.
B: Ok, I will.
5) A: I have just walked five kilometres!
B: You must be very tired now.
6) A: Will you give this to Elle, please?
B: With pleasure.
7) A: It’s raining cats and dogs outside.
B: Really? Then I have to take an umbrella with me.
8) A: Must I hand in the homework now?
B: No, you don’t have to. You may hand it in tomorrow morning.
9) A: When are we going to leave the hotel?
B: We must leave the hotel before 6 p.m.
1. must与have to的区别
have to比较强调客观需要,
must着重说明主观看法。
另外have to能用于更多时态, 比较下面的句子：
We had to be there at 10:00.
有时两者都可以用, 意思差别不大。
e.g.
We must/have to leave now.
must在表示说话人对事物的推测.