精英家教网 > 高中英语 > 题目详情
The house is dirty because it  since they moved out.
A.doesn’t cleanB.isn’t cleanedC.hasn’t cleanedD.hasn’t been cleaned
D

试题分析:考查时态:句意:房子很脏,因为自从他们搬出去了一直没有被打扫。时间状语是since连接的时间状语从句,和现在完成时连用,因为the house和clean是被动关系,用现在完成时的被动。选D。
点评:英语中的时态主要由动词的形式决定,因此在学习英语时态时,要注意分析动词形式及具体语境,想象在那个特定的时间动作所发生的背景,这个动作是经常性动作、一般性动作、进行性动作、完成性动作还是将要发生的动作。这题的关键是since连接的时间状语从句。
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