发布网友 发布时间:2024-09-30 04:31
共1个回答
热心网友 时间:2024-11-08 21:37
过去进行时是英语中描述过去某一时间正在进行的动作的重要语法形式。例如,句子"He fell asleep when he was reading"(他看书时睡着了)中,过去进行时表明了动作的持续性。它在表达礼貌和委婉时也有独特作用,如"I was wondering if you could give me a lift"(我想知道你能否让我搭车),相较于一般过去时,显得更加客气和不确定。
过去进行时可以表达多种感情色彩,类似于现在进行时,常与"always", "forever", "continually"等副词连用,如"They were always quarrelling"(他们老是吵架)。此外,动词"be"的过去进行时也可表示过去的临时状态,如"He was being friendly"(他当时显得很友好),区别于长期状态"He was friendly"。
在特殊用法中,当句子含义清晰时,可以将两个动作都用一般过去时来替换,如"We listened carefully when the teacher read the text"(老师读课文时,我们都仔细听着)。过去进行时也能用于描述按计划进行的动作,如"He told me that he was going soon"(他告诉我他很快就要走了)。同时,它也常用来描绘故事背景,如"It was snowing as the medical team made its way to the front"(医疗小组往前线行进时,天正下着雪)。
对于新的动作开始,过去进行时有类似镜头切换的效果,如"Five minutes later, he stood in the doorway smoking a cigarette"(5分钟后,他已站在门口抽着烟)。此外,过去进行时还可以与"when"结构配合,表达意外情况,如"I was walking in the street when someone called me"(我正在街上走时突然有人喊我)。
最后,过去进行时有时用来解释原因或作为借口,如"She went to the doctor yesterday. She was having a lot of trouble with her heart"(她昨天去看病了。她的心脏病很严重)。与"always"等词连用时,可以强烈表达情感,如"The girl was always changing her mind"(这女孩老是改变主意)。
过去进行时表示在过去某一时刻或某一段时间内进行或发生的动作。其形式为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。