情态动词表示猜测

Must 表示猜测时候的否定形式： can’t/ couldn’t
It must be eleven o’clock now. -It can’t / couldn’t be eleven o’clock now. You must have met him before. - You cannot/ couldn’t have met him before.
3. You must have been in Beijing last month, ____? A. aren’t you B. did you C.weren’ you D. didn’t you 4. Oh, so many letters! You must have lots of friends, ______? A. mustn’t you B. don’t you C. didn’t you D. have you
在疑问句中表示猜测用 can/could
他可能是谁啊？ Who can it be? 钥匙不在了。可能是谁拿走了？ The key is not here. Who could have taken it?.
1. The workers can’t have finished their work yet, _____? A. Can they B. are they C. have they D. do they 2. You must have been there before, ____? A.have you B. did you C. haven’t you D. didn’t you
情态动词表示猜测
Must 表示有把握的猜测，意为“一定是”，“准 是”有三种形式。 1） 对现在情况的猜测：must +do 那个高个子男孩一定是个篮球运动员。 The tall boy must be a basketball player. 我考试没及格，你一定认为我很懒。 I failed in the exam, you must think I am lazy. 2） 对现在正在进行中的事情的猜测； must+be+doing 他看上去很忙，他一定在做作业。 He looks busy, he must be doing his homework. 3） 对过去事情的猜测：must have done/been 你昨天一定遇到他了。 You must have met him yesterday.
As a girl of 17, I am outgoing, good at Enlish. Most importantly, I have an experience of woking well with children aged from 7 to 12. I think it is a kind of win-win activity. For one thing, I can help take care of the children. For another, I can improve my English and make more friends. What’s more, I can enrich my life during the summer vacation. Looking forward to your reply. sincerely yours, Li Hua
May/might
May/might 表示没有把握的猜测。 1） 对现在情况的猜测：may/might +do 那个高个子男孩可能是个篮球运动员。 The tall boy may/might be a basketball player. 我考试没及格，你可能认为我很懒。 I failed in the exam,Байду номын сангаасyou may/might think I am lazy. 2） 对现在正在进行中的事情的猜测； may/might+be+doing 他可能在做作业。 He may/might be dong his homework. 3） 对过去事情的猜测：may/might have done/been 你昨天可能遇到他了。 You may/might have met him yesterday