题目内容
2.-John,you can't go out to play until your homework _____.-OK,Mum.( )
| A. | finishes | B. | has finished | C. | is finished |
分析 --约翰,做完作业,你才能出去玩.
--好的.妈妈.
解答 答案:C 根据…until your homework _____.可知这句话的主语是your homework,是动作的承受者,它和动词finish构成被动关系,所以应该用被动语态.until引导的是时间状语从句,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your homework,是第三人称单数,所以应该是is finished,故选:C.
点评 本题主要考查被动语态,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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