情态动词的题 就一道 _____he have been chosen as captain of our school football team -_____he have been chosen as captain of our school football team -Yes ,he _____.Can't you see he's wearing an armband A.can ;can B.Must ;must have C.Must ;mu

情态动词的题 就一道 _____he have been chosen as captain of our school football team -_____he have been chosen as captain of our school football team -Yes ,he _____.Can't you see he's wearing an armband A.can ;can B.Must ;must have C.Must ;mu
情态动词的题 就一道 _____he have been chosen as captain of our school football team
-_____he have been chosen as captain of our school football team
-Yes ,he _____.Can't you see he's wearing an armband
A.can ;can B.Must ;must have C.Must ;must D.Can;must have
关键是第二空,为什么must 后有个have 这里是省略还是指代什么

情态动词的题 就一道 _____he have been chosen as captain of our school football team -_____he have been chosen as captain of our school football team -Yes ,he _____.Can't you see he's wearing an armband A.can ;can B.Must ;must have C.Must ;mu
本题是情态动词的用法,是用情态动词加have done 对过去已发生事情进行推断,can用于否定句和疑问句,must（一定） ,may（可能）,might\could（或许)用于肯定句,发生的可能性依次降低,have是助动词,不能译为“有”,本句译为：他能被选为了我们学校足球队的队长了吗?是的,他一定被选上了,难道你没看见他正带着臂章吗?第二空must have 后省略了been chosen as captain of our school football team .不要把本题理解为现在完成时.

must 用在这里表示猜测，并且后面也说猜测的根据！
must后面有个have的确是省略。因为上面一句已经提过了he have been chosen 。所以回答时光说到have就行了，并且have不能少！

must have done sth.一定做过了什么。

must + have + 过去分词
表示对过去事情的推测
（三） must和have to的用法
1.表示必须、必要。例如：
You must come in time .
回答must引出的问句时，如果是肯定的，要用must；如果是否定的，不能用mustn’t，而要用needn’t或don’t have to。例如：
—Must w...

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must + have + 过去分词
表示对过去事情的推测
（三） must和have to的用法
1.表示必须、必要。例如：
You must come in time .
回答must引出的问句时，如果是肯定的，要用must；如果是否定的，不能用mustn’t，而要用needn’t或don’t have to。例如：
—Must we hand in our exercise books today ?
—Yes, you must .
—No, you don’t have to ( you needn’t ) .
2.“must + not”表示禁止。例如：
You must not walk on grass .
You mustn’t pick the flowers in the park .
3.“must be + 表语”的结构表示有把握的推测，它的否定或疑问形式用can代替must。例如：
This must be your pen .
4.must和have to表示“必须”时，意思很相似，但有下列几点区别应注意：
1) must表示的是说话人的主观看法，而have to则往往强调客观需要。比较：
The play is not interesting, I really must go now .
I had to work when I was your age .
2) must一般只表现在，have to则有更多的时态形式。
3) must可以表示推断，have to不能。
4) 询问对方的意愿时应用must。例如：
—Must I clean all the rooms ?
—Yes, you must .( No, you needn’t . )
5) 二者的否定意义大不相同。must not表示禁止，是说话人强有力的劝告，意为“决不可以”、“不准”、“不允许”。Don’t have to意为“不必”。比较：
You mustn’t go .你决不可去。
You don’t have to go .你不必去。
must表示推测

1) must用在肯定句中表示较有把握的推测，意为"一定"。
2) must表对现在的状态或现在正发生的事情的推测时， must 后面通常接系动词be 的原形或行为动词的进行式。
You have worked hard all day.You must be tired. 你辛苦干一整天，一定累了。（对现在情况的推测判断）
He must be working in his office. 他一定在办公室工作呢。
比较：
He must be staying there.
他现在肯定呆在那里。
He must stay there.
他必须呆在那。
3) must 表示对已发生的事情的推测时，must 要接完成式。
I didn't hear the phone. I must have been asleep. 我刚才没有听到电话，我想必是睡着了。
4) must表示对过去某时正发生的事情的推测，must 后面要接不定式的完成进行式。
---Why didn't you answer my phone call?
---Well, I must have been sleeping, so I didn't hear it.
5) 否定推测用can't。
If Tom didn't leave here until five o'clock, he can't be home yet. 如果汤姆五点才离开这儿，他此时一定还未到家。

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