题目内容
20.I _____ for the light to turn green when I saw the boy help an old man up.( )A. | had waited | B. | was waiting | C. | would wait | D. | waited |
分析 我正在等绿灯这时看见这个男孩扶一位老人起来.
解答 答案是B.本题考查过去进行时;过去进行时表示过去某一点时间或过去某一段时间内正在进行的动作;根据语境,我"正在等"绿灯这时看见这个男孩扶一位老人起来,可见句中需要过去进行时,故选B.
点评 对时态的选择,要在把握时态的基本用法的基础上,根据具体语境和题干中的时间推断时态,同时关注特殊的结构.
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