他肯定很懒,因为他的课桌很不整洁。
Carol must get very bored with her job. She does the same thing every day.
卡罗尔肯定对她的工作厌烦了,她每天都做同样的事。
must be doing表示对现在动作或状态的推测。
Put on more clothes. You must be feeling cold with only a shirt on.
多穿点儿衣服,你只穿一件衬衣,肯定觉得冷。
must have done表示对过去的动作或状态的推测。
The ground is wet. It must have rained last night.
地面是湿的,昨晚肯定下雨了。
I didn't hear the phone. I must have been asleep.
我没听见电话铃响,我一定是睡着了。
提示:
must表示推测只用于肯定句,否定句和疑问句要用can, could来代替must。
He's just had his lunch. He can't be hungry already.
他刚吃过午饭,不会饿的。
They have just arrived here. They can't know many people.
他们刚到这里,不可能认识很多人。
Leslie walked past me without speaking. He can'tcouldn't have seen me.
莱斯利从我身边走过而没打招呼,他肯定没看见我。
5.must可用来表示根据逻辑推理必然要发生的事,可译为“必然会,总是会”。
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