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过去完成时例句,过去完成时例句简单

时间:2025-02-25 04:54:37作者:简单的爱来源:网络
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过去完成时例句,过去完成时例句简单

过去完成时,也称为"过去未曾完成时",是英语中的一个时态,它表示一个在过去某个时间点或动作之前已经完成的动作或状态。它通常与"by"、"before"、"had"等词连用,用来描述一个在过去已结束的动作对过去的某个时间产生影响。

以下是几个过去完成时的例子:

1. 例句1
"By the time I arrived home, my dinner had already been cooked." (当我到家时,晚餐已经做好了。)

2. 例句2
"She had finished her homework before her mother came back." (她在妈妈回来之前就已经完成了作业。)

3. 例句3
"They had lived in that house for 20 years before they moved." (他们搬家前,在那所房子里住了20年。)

4. 例句4
"He had studied all night, so he passed the exam." (他整晚都在学习,所以考试通过了。)

在这些例子中,"had"是过去完成时的标志,表明动作发生在过去的过去。

过去完成时的标志词

过去完成时常常通过以下几个标志词和表达来表示:

1. "had":这是过去完成时的主要标志,通常位于句首或动词前,如 "I had studied" 或 "They had already left".

2. "had" 的各种变化形式:
"had+过去分词",如 "had finished" 或 "had eaten".
"had been" 的结构,用于强调持续性,如 "had been living" 或 "had been working"。

3. 表示过去的过去时间状语:
"by" 或 "before",如 "by the time I arrived" 或 "before she died".
使用 "just" 或 "already" 等副词,如 "He had already arrived" 或 "She had just finished".

4. 使用虚拟语气时,过去完成时用于描述与现在事实相反的情况,标志词可能是 "if" 后面接 "had",如 "If I had known, I would have come earlier."

5. 其他类似短语:
"The first time I had seen her",表示过去某个时刻之前已经见过。
"They had never been to that city",表示之前从未去过。

记住这些标志词可以帮助你更好地识别和运用过去完成时。

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