题目内容
9.-When did the classroom have a power cut?-This morning,while we ________ a physics lesson.( )
| A. | have had | B. | were having | C. | are having | D. | will have |
分析 ---你的教室什么时候停电的?
---今天早上,当我们正在上物理课的时候.
解答 答案:B.结合This morning,while we ________ a physics lesson可知表达的是过去进行时was/were+doing,主语we,故were,故答案是B.
点评 概念和用法:过去进行时.表示过去在某一时间段或某一段时间内正在发生或进行的动作或状态.其形式为 主语+was/were+V-ing.常与表示过去的时间状语连用,如:last night,last Saturday等;或者与when,while,as引导的过去时间状语连用.例如:We were watching TV from seven to nine last night.昨天晚上七点到九点的时候我们在看电视.What was he researching all day last Sunday?上周日他一整天都在研究什么?
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