题目内容
1.Don't discuss the problems with your partner unless you ________ to do so.( )| A. | ask | B. | are asked | C. | will ask | D. | will be asked |
分析 不要和你的同伴讨论这些问题,除非你被要求这样做.
解答 答案:B 根据unless you ________ to do so.可知这句话的主语是you,是动作的承受者,它和动词ask构成被动关系,所以应该用被动语态.unless you ________ to do so.句中unless引导的是条件状语从句,应该用一般现在时表将来.一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.主语you,所以应该是are asked,故选:B.
点评 主要考查被动语态,当句子的主语是动作的承受者时,应该用被动语态,本题考查的是一般现在时态的被动语态.一定注意其构成形式,一般现在时的被动语态的构成:am/is/are+及物动词的过去分词.
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