题目内容
15.-Mum,when can I watch TV?-As soon as your homework ______.( )
A. | finish | B. | finished | ||
C. | is finished | D. | will be finished |
分析 -妈妈,我什么时候能看电视?
-你的作业一被做完(就可以看).
解答 答案:C 根据答语中的关键词as soon as其后引导了一个时间状语从句,这是一个省略句,省略了主句,它的用法规则是"主将从现,所以此从句应用一般现在时表将来;又根据答语的主语是homework,是由物充当的,是谓语动词被动的承受着,意为作业被完成,所以这句应用一般现在时的被动语态去完成.其构成为am/is/are+动词的过去分词.由于主语homework为表物的单数故用is,结合选项应为is finished.故选C.
点评 做此类题一是要联系语境及关键词确定好时态;二是要根据主语判断是动作主动的发出者还是被动的承受着;两方面结合根据所学的被动语态的知识就可迎刃而解.
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