They must be your classmates, ________ they?


  1. A.
    aren't
  2. B.
    must
  3. C.
    mustn't
  4. D.
    are
A
本題主要考查學生對must表示推測意義的掌握。在英語的反意疑問句中,我們經(jīng)常見到前面是一個肯定句,后面是一個簡潔的疑問句;表現(xiàn)形式是前句是肯定形式,后句自然為否定,反之亦然。例如:
You are a student, aren't you?
你是個學生,是嗎?
She went to see her mother yesterday, didn't she?
她昨天看母親去了,是嗎?
但在must表示推測的句子中,這其實就是一個頗為肯定的語氣,構成該句的反意疑問句時,不能再套用must進行推測,而應該根據(jù)動作發(fā)生的時間來推測。例如:
They must be hungry, aren't they?
他們一定是餓了,是嗎?
You must have forgotten it, haven't you?
你想必將它忘了,是嗎?
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