题目内容
9．We _____ dinner when she came in．（ ）| A． | are having | B． | were having | C． | will have | D． | came |
分析 当她进来的时候我们正在吃晚饭．
解答 答案：B．when引导的时间状语从句，表示当…时候，结合句意表示过去正在进行的动作用过去进行时was/were+doing，主语we，故were，故答案是B．
点评 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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