2. 外语
  3. Which of the following sentences expresses certainty?

Which of the following sentences expresses certainty?

admin2015-02-14  46
问题 Which of the following sentences expresses certainty?
选项 A、Bad seeds must bring bad crops.
B、There must be a mistake.
C、You must be there by ten.
D、You must be joking.
答案A
解析 情态动词。must在肯定陈述句中，可以表示说话人的主观意志，或要求对方必须做某事，如C项；也可以表示推测，指在说话人看来一定是、必然是，一般也只用于肯定陈述句，其后的不定式也可以用进行体，如C、Dr页。A项中，must表示“必然”，即根据逻辑推理必然要发生某事，意义等于will certainly，故为正确答案。
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