题目内容
1.You can't leave the classroom before your work________.( )| A. | does | B. | will be done | C. | is done | D. | was done |
分析 做完你的工作之前你不能离开教室.
解答 答案:C.before引导的时间状语从句,主句含有情态动词,从句用一般现在时,主语your work是动词do的承受者,故用一般现在时的被动语态be+过去分词,主语三单,故is,do的过去分词done,故答案是C.
点评 一般现在时的被动语态,其主要结构为:
★主语(动作接受者)+is/am/are+动词的过去分词+(by+动作执行者)
Football is played in most countries in the world.
被动语态的句型总结如下:
肯定句:主语+be+过去分词+(by ).
The boy is called Jack.
否定句:主语+be not+过去分词+(by ).
The baby is not looked after by his father.
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